docs(CHANGELOG.md): Changelog for 0.31.1

Signed-off-by: Luca Guerra <luca@guerra.sh>

.circleci/config.yml

@@ -13,7 +13,7 @@ jobs:
           command: apk update
       - run:
           name: Install build dependencies
-          command: apk add g++ gcc cmake cmake make git bash perl linux-headers autoconf automake m4 libtool elfutils-dev libelf-static patch binutils
+          command: apk add g++ gcc cmake make git bash perl linux-headers autoconf automake m4 libtool elfutils-dev libelf-static patch binutils
       - run:
           name: Prepare project
           command: |
@@ -176,38 +176,6 @@ jobs:
             pushd build
             make tests
             popd
-  # Build using CentOS 8
-  # This build is static, dependencies are bundled in the Falco binary
-  "build/centos8":
-    docker:
-      - image: centos:8
-    steps:
-      - checkout
-      - run:
-          name: Update base image
-          command: dnf update -y
-      - run:
-          name: Install dependencies
-          command: dnf install gcc gcc-c++ git make cmake autoconf automake pkg-config patch libtool elfutils-libelf-devel diffutils kernel-devel kernel-headers kernel-core clang llvm which -y
-      - run:
-          name: Prepare project
-          command: |
-            mkdir build
-            pushd build
-            cmake -DBUILD_BPF=On -DUSE_BUNDLED_DEPS=On ..
-            popd
-      - run:
-          name: Build
-          command: |
-            pushd build
-            KERNELDIR=/lib/modules/$(ls /lib/modules)/build make -j4 all
-            popd
-      - run:
-          name: Run unit tests
-          command: |
-            pushd build
-            make tests
-            popd
   # Build using our own builder base image using centos 7
   # This build is static, dependencies are bundled in the Falco binary
   "build/centos7":
@@ -394,6 +362,12 @@ jobs:
           command: |
             FALCO_VERSION=$(cat /build/release/userspace/falco/config_falco.h | grep 'FALCO_VERSION ' | cut -d' ' -f3 | sed -e 's/^"//' -e 's/"$//')
             /source/falco/scripts/publish-bin -f /build/release/falco-${FALCO_VERSION}-x86_64.tar.gz -r bin-dev -a x86_64
+      - run:
+          name: Publish bin-static-dev
+          command: |
+            FALCO_VERSION=$(cat /build-static/release/userspace/falco/config_falco.h | grep 'FALCO_VERSION ' | cut -d' ' -f3 | sed -e 's/^"//' -e 's/"$//')
+            cp -f /build-static/release/falco-${FALCO_VERSION}-x86_64.tar.gz /build-static/release/falco-${FALCO_VERSION}-static-x86_64.tar.gz
+            /source/falco/scripts/publish-bin -f /build-static/release/falco-${FALCO_VERSION}-static-x86_64.tar.gz -r bin-dev -a x86_64
   "publish/packages-deb-dev":
     docker:
       - image: docker.io/debian:stable
@@ -508,6 +482,12 @@ jobs:
           command: |
             FALCO_VERSION=$(cat /build/release/userspace/falco/config_falco.h | grep 'FALCO_VERSION ' | cut -d' ' -f3 | sed -e 's/^"//' -e 's/"$//')
             /source/falco/scripts/publish-bin -f /build/release/falco-${FALCO_VERSION}-x86_64.tar.gz -r bin -a x86_64
+      - run:
+          name: Publish bin-static
+          command: |
+            FALCO_VERSION=$(cat /build-static/release/userspace/falco/config_falco.h | grep 'FALCO_VERSION ' | cut -d' ' -f3 | sed -e 's/^"//' -e 's/"$//')
+            cp -f /build-static/release/falco-${FALCO_VERSION}-x86_64.tar.gz /build-static/release/falco-${FALCO_VERSION}-static-x86_64.tar.gz
+            /source/falco/scripts/publish-bin -f /build-static/release/falco-${FALCO_VERSION}-static-x86_64.tar.gz -r bin -a x86_64
   "publish/packages-deb":
     docker:
       - image: docker.io/debian:stable
@@ -618,7 +598,6 @@ workflows:
       - "build/ubuntu-focal"
       - "build/ubuntu-focal-debug"
       - "build/ubuntu-bionic"
-      - "build/centos8"
       - "build/centos7"
       - "build/centos7-debug"
       - "tests/integration":
@@ -682,7 +661,7 @@ workflows:
               only: master
           requires:
             - publish/docker-dev
-      # - "quality/static-analysis" # This is temporarly disabled: https://github.com/falcosecurity/falco/issues/1526
+      # - "quality/static-analysis" # This is temporarily disabled: https://github.com/falcosecurity/falco/issues/1526
   release:
     jobs:
       - "build/musl":
@@ -711,6 +690,7 @@ workflows:
             - falco
             - test-infra
           requires:
+            - "build/musl"
             - "rpm/sign"
           filters:
             tags:

.cmake-format

@@ -7,7 +7,7 @@ line_width = 120
 # How many spaces to tab for indent
 tab_size = 2
 
-# If arglists are longer than this, break them always
+# If arg lists are longer than this, break them always
 max_subargs_per_line = 3
 
 # If true, separate flow control names from their parentheses with a space
@@ -21,7 +21,7 @@ separate_fn_name_with_space = False
 dangle_parens = False
 
 # If the statement spelling length (including space and parenthesis is larger
-# than the tab width by more than this amoung, then force reject un-nested
+# than the tab width by more than this among, then force reject un-nested
 # layouts.
 max_prefix_chars = 2
 
@@ -54,7 +54,7 @@ always_wrap = []
 algorithm_order = [0, 1, 2, 3, 4]
 
 # If true, the argument lists which are known to be sortable will be sorted
-# lexicographicall
+# lexicographically
 enable_sort = True
 
 # If true, the parsers may infer whether or not an argument list is sortable

ADOPTERS.md

@@ -24,6 +24,8 @@ This is a list of production adopters of Falco (in alphabetical order):
 
 * [Coveo](https://www.coveo.com/) - Coveo stitches together content and data, learning from every interaction, to tailor every experience using AI to drive growth, satisfy customers and develop employee proficiency. All Falco events are centralized in our SIEM for analysis. Understanding what is running on production servers, and the context around why things are running is even more tricky now that we have further abstractions with containers and orchestration systems. Falco is giving us a good visibility inside containers and complement other Host and Network Intrusion Detection Systems. In a near future, we expect to deploy serverless functions to take action when Falco identifies patterns worth taking action for.
 
+* [Fairwinds](https://fairwinds.com/) - [Fairwinds Insights](https://fairwinds.com/insights), Kubernetes governance software, integrates Falco to offer a single pane of glass view into potential security incidents. Insights adds out-of-the-box integrations and rules filter to reduce alert fatigue and improve security response. The platform adds security prevention, detection, and response capabilities to your existing Kubernetes infrastructure. Security and DevOps teams benefit from a centralized view of container security vulnerability scanning and runtime container security.
+
 * [Frame.io](https://frame.io/) - Frame.io is a cloud-based (SaaS) video review and collaboration platform that enables users to securely upload source media, work-in-progress edits, dailies, and more into private workspaces where they can invite their team and clients to collaborate on projects. Understanding what is running on production servers, and the context around why things are running is even more tricky now that we have further abstractions like Docker and Kubernetes. To get this needed visibility into our system, we rely on Falco. Falco's ability to collect raw system calls such as open, connect, exec, along with their arguments offer key insights on what is happening on the production system and became the foundation of our intrusion detection and alerting system.
 
 * [Giant Swarm](https://www.giantswarm.io/) - Giant Swarm manages Kubernetes clusters and infrastructure for enterprises across multiple cloud providers as well as several flavors of on-premises data centers. Our platform provisions and monitors pure "vanilla" Kubernetes clusters which can be augmented with managed solutions to many common Kubernetes challenges, including security. We use Falco for anomaly detection as part of our collection of entirely open-source tools for securing our own clusters, and offer the same capabilities to our customers as part of our [managed security offering](https://docs.giantswarm.io/app-platform/apps/security/).
@@ -39,10 +41,10 @@ This is a list of production adopters of Falco (in alphabetical order):
 
 * [Pocteo](https://pocteo.co) - Pocteo helps with Kubernetes adoption in enterprises by providing a variety of services such as training, consulting, auditing and mentoring. We build CI/CD pipelines the GitOps way, as well as design and run k8s clusters. Pocteo uses Falco as a runtime monitoring system to secure clients' workloads against suspicious behavior and ensure k8s pods immutability. We also use Falco to collect, process and act on security events through a response engine and serverless functions.
 
-* [Preferral](https://www.preferral.com) - Preferral is a HIPAA-compliant platform for Referral Management and Online Referral Forms. Preferral streamlines the referral process for patients, specialists and their referral partners. By automating the referral process, referring practices spend less time on the phone, manual efforts are eliminated, and patients get the right care from the right specialist. Preferral leverages Falco to provide a Host Intrusion Detection System to meet their HIPPA compliance requirements.
+* [Preferral](https://www.preferral.com) - Preferral is a HIPAA-compliant platform for Referral Management and Online Referral Forms. Preferral streamlines the referral process for patients, specialists and their referral partners. By automating the referral process, referring practices spend less time on the phone, manual efforts are eliminated, and patients get the right care from the right specialist. Preferral leverages Falco to provide a Host Intrusion Detection System to meet their HIPAA compliance requirements.
   * https://hipaa.preferral.com/01-preferral_hipaa_compliance/
 
-* [Qonto](https://qonto.com) - Qonto is a modern banking for SMEs and freelancers. Qonto provides a fully featured business account with a simplified accounting flow. Falco is used by our SecOps team to detect suspicous behaviors in our clusters.
+* [Qonto](https://qonto.com) - Qonto is a modern banking for SMEs and freelancers. Qonto provides a fully featured business account with a simplified accounting flow. Falco is used by our SecOps team to detect suspicious behaviors in our clusters.
 
 * [Raft](https://goraft.tech) - Raft is a government contractor that offers cloud-native solutions across many different agencies including DoD (Department of Defense), HHS (Health and Human Services), as well as within CFPB (Consumer Finance Protection Bureau). Raft leverages Falco to detect threats in our client's Kubernetes clusters and as a Host Intrusion Detection System. Raft proudly recommends Falco across all our different projects.
 
@@ -64,7 +66,7 @@ This is a list of production adopters of Falco (in alphabetical order):
 
 * [Yahoo! JAPAN](https://www.yahoo.co.jp/) Yahoo! JAPAN is a leading company of internet in Japan. We build an AI Platform in our private cloud and provide it to scientists in our company. AI Platform is a multi-tenant Kubernetes environment and more flexible, faster, more efficient Machine Learning environment. Falco is used to detect unauthorized commands and malicious access and our AI Platform is monitored and alerted by Falco.
 
-* [Sysdig](https://www.sysdig.com/) Sysdig originally created Falco in 2016 to detect unexpected or suspicious activity using a rules engine on top of the data that comes from the sysdig kernel system call probe. Sysdig provides tooling to help with vulnerability management, compliance, detection, incident response and forensics in Cloud-native environments. Sysdig Secure has extended Falco to include: a rule library, the ability to update macros, lists & rules via the user interface and API, automated tuning of rules, and rule creation based on profiling known system behavior. On top of the basic Falco rules, Sysdig Secure implements the concept of a "Security policy" that can comprise several rules which are evaluated for a user-defined infrastructure scope like Kubernetes namespaces, OpenShift clusters, deployment workload, cloud regions etc.
+* [Sysdig](https://www.sysdig.com/) Sysdig originally created Falco in 2016 to detect unexpected or suspicious activity using a rules engine on top of the data that comes from the sysdig kernel system call driver. Sysdig provides tooling to help with vulnerability management, compliance, detection, incident response and forensics in Cloud-native environments. Sysdig Secure has extended Falco to include: a rule library, the ability to update macros, lists & rules via the user interface and API, automated tuning of rules, and rule creation based on profiling known system behavior. On top of the basic Falco rules, Sysdig Secure implements the concept of a "Security policy" that can comprise several rules which are evaluated for a user-defined infrastructure scope like Kubernetes namespaces, OpenShift clusters, deployment workload, cloud regions etc.
 
 ## Projects that use Falco libs
 

CHANGELOG.md

@@ -1,5 +1,150 @@
 # Change Log
 
+## v0.31.1
+
+Released on 2022-03-09
+
+### Major Changes
+
+
+* new: add a new drop category `n_drops_scratch_map` [[#1916](https://github.com/falcosecurity/falco/pull/1916)] - [@Andreagit97](https://github.com/Andreagit97)
+* new: allow to specify multiple --cri options [[#1893](https://github.com/falcosecurity/falco/pull/1893)] - [@FedeDP](https://github.com/FedeDP)
+
+
+### Minor Changes
+
+* refactor(userspace/falco): replace direct getopt_long() cmdline option parsing with third-party cxxopts library. [[#1886](https://github.com/falcosecurity/falco/pull/1886)] - [@mstemm](https://github.com/mstemm)
+* update: driver version is b7eb0dd [[#1923](https://github.com/falcosecurity/falco/pull/1923)] - [@LucaGuerra](https://github.com/LucaGuerra)
+
+
+### Bug Fixes
+
+* fix(userspace/falco): correct plugins init config conversion from YAML to JSON [[#1907](https://github.com/falcosecurity/falco/pull/1907)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* fix(userspace/engine): for rules at the informational level being loaded at the notice level [[#1885](https://github.com/falcosecurity/falco/pull/1885)] - [@mike-stewart](https://github.com/mike-stewart)
+* chore(userspace/falco): fixes truncated -b option description. [[#1915](https://github.com/falcosecurity/falco/pull/1915)] - [@andreabonanno](https://github.com/andreabonanno)
+* update(falco): updates usage description for -o, --option [[#1903](https://github.com/falcosecurity/falco/pull/1903)] - [@andreabonanno](https://github.com/andreabonanno)
+
+
+### Rule Changes
+
+* rule(Detect outbound connections to common miner pool ports): fix url in rule output [[#1918](https://github.com/falcosecurity/falco/pull/1918)] - [@jsoref](https://github.com/jsoref)
+* rule(macro somebody_becoming_themself): renaming macro to somebody_becoming_themselves [[#1918](https://github.com/falcosecurity/falco/pull/1918)] - [@jsoref](https://github.com/jsoref)
+* rule(list package_mgmt_binaries): `npm` added [[#1866](https://github.com/falcosecurity/falco/pull/1866)] - [@rileydakota](https://github.com/rileydakota)
+* rule(Launch Package Management Process in Container): support for detecting `npm` usage [[#1866](https://github.com/falcosecurity/falco/pull/1866)] - [@rileydakota](https://github.com/rileydakota)
+* rule(Polkit Local Privilege Escalation Vulnerability): new rule created to detect CVE-2021-4034 [[#1877](https://github.com/falcosecurity/falco/pull/1877)] - [@darryk10](https://github.com/darryk10)
+* rule(macro: modify_shell_history): avoid false-positive alerts triggered by modifications to .zsh_history.new and .zsh_history.LOCK files [[#1832](https://github.com/falcosecurity/falco/pull/1832)] - [@m4wh6k](https://github.com/m4wh6k)
+* rule(macro: truncate_shell_history): avoid false-positive alerts triggered by modifications to .zsh_history.new and .zsh_history.LOCK files [[#1832](https://github.com/falcosecurity/falco/pull/1832)] - [@m4wh6k](https://github.com/m4wh6k)
+* rule(macro sssd_writing_krb): fixed a false-positive alert that was being generated when SSSD updates /etc/krb5.keytab [[#1825](https://github.com/falcosecurity/falco/pull/1825)] - [@mac-chaffee](https://github.com/mac-chaffee)
+* rule(macro write_etc_common): fixed a false-positive alert that was being generated when SSSD updates /etc/krb5.keytab [[#1825](https://github.com/falcosecurity/falco/pull/1825)] - [@mac-chaffee](https://github.com/mac-chaffee)
+* upgrade macro(keepalived_writing_conf) [[#1742](https://github.com/falcosecurity/falco/pull/1742)] - [@pabloopez](https://github.com/pabloopez)
+* rule_output(Delete Bucket Public Access Block) typo [[#1888](https://github.com/falcosecurity/falco/pull/1888)] - [@pabloopez](https://github.com/pabloopez)
+
+
+### Non user-facing changes
+
+* fix(build): fix civetweb linking in cmake module [[#1919](https://github.com/falcosecurity/falco/pull/1919)] - [@LucaGuerra](https://github.com/LucaGuerra)
+* chore(userspace/engine): remove unused lua functions and state vars [[#1908](https://github.com/falcosecurity/falco/pull/1908)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* fix(userspace/falco): applies FALCO_INSTALL_CONF_FILE as the default … [[#1900](https://github.com/falcosecurity/falco/pull/1900)] - [@andreabonanno](https://github.com/andreabonanno)
+* fix(scripts): correct typo in `falco-driver-loader` help message [[#1899](https://github.com/falcosecurity/falco/pull/1899)] - [@leogr](https://github.com/leogr)
+* update(build)!: replaced various `PROBE` with `DRIVER` where necessary. [[#1887](https://github.com/falcosecurity/falco/pull/1887)] - [@FedeDP](https://github.com/FedeDP)
+* Add [Fairwinds](https://fairwinds.com) to the adopters list [[#1917](https://github.com/falcosecurity/falco/pull/1917)] - [@sudermanjr](https://github.com/sudermanjr)
+* build(cmake): several cmake changes to speed up/simplify builds for external projects and copying files from source-to-build directories [[#1905](https://github.com/falcosecurity/falco/pull/1905)] - [@mstemm](https://github.com/mstemm)
+
+
+## v0.31.0
+
+Released on 2022-01-31
+
+### Major Changes
+
+
+* new: add support for plugins to extend Falco functionality to new event sources and custom fields [[#1753](https://github.com/falcosecurity/falco/pull/1753)] - [@mstemm](https://github.com/mstemm)
+* new: add ability to set User-Agent http header when sending http output. Provide default value of 'falcosecurity/falco'. [[#1850](https://github.com/falcosecurity/falco/pull/1850)] - [@yoshi314](https://github.com/yoshi314)
+* new(configuration): support defining plugin init config as a YAML [[#1852](https://github.com/falcosecurity/falco/pull/1852)] - [@jasondellaluce](https://github.com/jasondellaluce)
+
+
+### Minor Changes
+
+* rules: add the official Falco ECR repository to rules [[#1817](https://github.com/falcosecurity/falco/pull/1817)] - [@calvinbui](https://github.com/calvinbui)
+* build: update CircleCI machine image for eBPF tests to a newer version of ubuntu [[#1764](https://github.com/falcosecurity/falco/pull/1764)] - [@mstemm](https://github.com/mstemm)
+* update(engine): refactor Falco engine to be agnostic to specific event sources [[#1715](https://github.com/falcosecurity/falco/pull/1715)] - [@mstemm](https://github.com/mstemm)
+* build: upgrade civetweb to v1.15 [[#1782](https://github.com/falcosecurity/falco/pull/1782)] - [@FedeDP](https://github.com/FedeDP)
+* update: driver version is 319368f1ad778691164d33d59945e00c5752cd27 now [[#1861](https://github.com/falcosecurity/falco/pull/1861)] - [@FedeDP](https://github.com/FedeDP)
+* build: allow using local libs source dir by setting `FALCOSECURITY_LIBS_SOURCE_DIR` in cmake [[#1791](https://github.com/falcosecurity/falco/pull/1791)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* build: the statically linked binary package is now published with the `-static` suffix [[#1873](https://github.com/falcosecurity/falco/pull/1873)] - [@LucaGuerra](https://github.com/LucaGuerra)
+* update!: removed "--alternate-lua-dir" cmdline option as lua scripts are now embedded in Falco executable. [[#1872](https://github.com/falcosecurity/falco/pull/1872)] - [@FedeDP](https://github.com/FedeDP)
+* build: switch to dynamic build for the binary package (`.tar.gz`) [[#1853](https://github.com/falcosecurity/falco/pull/1853)] - [@LucaGuerra](https://github.com/LucaGuerra)
+* update: simpleconsumer filtering is now being done at kernel level [[#1846](https://github.com/falcosecurity/falco/pull/1846)] - [@FedeDP](https://github.com/FedeDP)
+* update(scripts/falco-driver-loader): first try to load the latest kmod version, then fallback to an already installed if any [[#1863](https://github.com/falcosecurity/falco/pull/1863)] - [@leogr](https://github.com/leogr)
+* refactor: clean up --list output with better formatting and no duplicate sections across event sources. [[#1816](https://github.com/falcosecurity/falco/pull/1816)] - [@mstemm](https://github.com/mstemm)
+* update: embed .lua files used to load/compile rules into the main falco executable, for simplicity and to avoid tampering. [[#1843](https://github.com/falcosecurity/falco/pull/1843)] - [@mstemm](https://github.com/mstemm)
+* update: support non-enumerable event sources in gRPC outputs service [[#1840](https://github.com/falcosecurity/falco/pull/1840)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* docs: add jasondellaluce to OWNERS [[#1818](https://github.com/falcosecurity/falco/pull/1818)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* chore: --list option can be used to selectively list fields related to new sources that are introduced by plugins [[#1839](https://github.com/falcosecurity/falco/pull/1839)] - [@loresuso](https://github.com/loresuso)
+* update(userspace/falco): support arbitrary-depth nested values in YAML configuration [[#1792](https://github.com/falcosecurity/falco/pull/1792)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* build: bump FakeIt version to 2.0.9 [[#1797](https://github.com/falcosecurity/falco/pull/1797)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* update: allow append of new exceptions to rules [[#1780](https://github.com/falcosecurity/falco/pull/1780)] - [@sai-arigeli](https://github.com/sai-arigeli)
+* update: Linux packages are now signed with SHA256 [[#1758](https://github.com/falcosecurity/falco/pull/1758)] - [@twa16](https://github.com/twa16)
+
+
+### Bug Fixes
+
+* fix(scripts/falco-driver-loader): fix for SELinux insmod denials [[#1756](https://github.com/falcosecurity/falco/pull/1756)] - [@dwindsor](https://github.com/dwindsor)
+* fix(scripts/falco-driver-loader): correctly clean loaded drivers when using `--clean` [[#1795](https://github.com/falcosecurity/falco/pull/1795)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* fix(userspace/falco): in case output_file cannot be opened, throw a falco exception [[#1773](https://github.com/falcosecurity/falco/pull/1773)] - [@FedeDP](https://github.com/FedeDP)
+* fix(userspace/engine): support jsonpointer escaping in rule parser [[#1777](https://github.com/falcosecurity/falco/pull/1777)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* fix(scripts/falco-driver-loader): support kernel object files in `.zst` and `.gz` compression formats [[#1863](https://github.com/falcosecurity/falco/pull/1863)] - [@leogr](https://github.com/leogr)
+* fix(engine): correctly format json output in json_event [[#1847](https://github.com/falcosecurity/falco/pull/1847)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* fix: set http output content type to text/plain when json output is disabled [[#1829](https://github.com/falcosecurity/falco/pull/1829)] - [@FedeDP](https://github.com/FedeDP)
+* fix(userspace/falco): accept 'Content-Type' header that contains "application/json", but it is not strictly equal to it [[#1800](https://github.com/falcosecurity/falco/pull/1800)] - [@FedeDP](https://github.com/FedeDP)
+* fix(userspace/engine): supporting enabled-only overwritten rules [[#1775](https://github.com/falcosecurity/falco/pull/1775)] - [@jasondellaluce](https://github.com/jasondellaluce)
+
+
+### Rule Changes
+
+* rule(Create Symlink Over Sensitive File): corrected typo in rule output [[#1820](https://github.com/falcosecurity/falco/pull/1820)] - [@deepskyblue86](https://github.com/deepskyblue86)
+* rule(macro open_write): add support to openat2 [[#1796](https://github.com/falcosecurity/falco/pull/1796)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* rule(macro open_read): add support to openat2 [[#1796](https://github.com/falcosecurity/falco/pull/1796)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* rule(macro open_directory): add support to openat2 [[#1796](https://github.com/falcosecurity/falco/pull/1796)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* rule(Create files below dev): add support to openat2 [[#1796](https://github.com/falcosecurity/falco/pull/1796)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* rule(Container Drift Detected (open+create)): add support to openat2 [[#1796](https://github.com/falcosecurity/falco/pull/1796)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* rule(macro sensitive_mount): add containerd socket [[#1815](https://github.com/falcosecurity/falco/pull/1815)] - [@loresuso](https://github.com/loresuso)
+* rule(macro spawned_process): monitor also processes spawned by `execveat` [[#1868](https://github.com/falcosecurity/falco/pull/1868)] - [@Andreagit97](https://github.com/Andreagit97)
+* rule(Create Hardlink Over Sensitive Files): new rule to detect hard links created over sensitive files [[#1810](https://github.com/falcosecurity/falco/pull/1810)] - [@sberkovich](https://github.com/sberkovich)
+* rule(Detect crypto miners using the Stratum protocol): add `stratum2+tcp` and `stratum+ssl` protocols detection [[#1810](https://github.com/falcosecurity/falco/pull/1810)] - [@sberkovich](https://github.com/sberkovich)
+* rule(Sudo Potential Privilege Escalation): correct special case for the CVE-2021-3156 exploit [[#1810](https://github.com/falcosecurity/falco/pull/1810)] - [@sberkovich](https://github.com/sberkovich)
+* rule(list falco_hostnetwork_images): moved to k8s_audit_rules.yaml to avoid a warning when usng falco_rules.yaml only [[#1681](https://github.com/falcosecurity/falco/pull/1681)] - [@leodido](https://github.com/leodido)
+* rule(list deb_binaries): remove `apt-config` [[#1860](https://github.com/falcosecurity/falco/pull/1860)] - [@Andreagit97](https://github.com/Andreagit97)
+* rule(Launch Remote File Copy Tools in Container): add additional binaries: curl and wget. [[#1771](https://github.com/falcosecurity/falco/pull/1771)] - [@ec4n6](https://github.com/ec4n6)
+* rule(list known_sa_list): add coredns, coredns-autoscaler, endpointslicemirroring-controller, horizontal-pod-autoscaler, job-controller, node-controller (nodelifecycle), persistent-volume-binder, pv-protection-controller, pvc-protection-controller, root-ca-cert-publisher and service-account-controller as allowed service accounts in the kube-system namespace [[#1760](https://github.com/falcosecurity/falco/pull/1760)] - [@sboschman](https://github.com/sboschman)
+
+
+### Non user-facing changes
+
+* fix: force-set evt.type for plugin source events [[#1878](https://github.com/falcosecurity/falco/pull/1878)] - [@FedeDP](https://github.com/FedeDP)
+* fix: updated some warning strings; properly refresh lua files embedded in falco [[#1864](https://github.com/falcosecurity/falco/pull/1864)] - [@FedeDP](https://github.com/FedeDP)
+* style(userspace/engine): avoid creating multiple versions of methods only to assume default ruleset. Use a default argument instead. [[#1754](https://github.com/falcosecurity/falco/pull/1754)] - [@FedeDP](https://github.com/FedeDP)
+* add raft in the adopters list [[#1776](https://github.com/falcosecurity/falco/pull/1776)] - [@teshsharma](https://github.com/teshsharma)
+* build: always populate partial version variables [[#1778](https://github.com/falcosecurity/falco/pull/1778)] - [@dnwe](https://github.com/dnwe)
+* build: updated cloudtrail plugin to latest version [[#1865](https://github.com/falcosecurity/falco/pull/1865)] - [@FedeDP](https://github.com/FedeDP)
+* replace ".." concatenation with table.concat [[#1834](https://github.com/falcosecurity/falco/pull/1834)] - [@VadimZy](https://github.com/VadimZy)
+* fix(userspace/engine): actually make m_filter_all_event_types useful by properly using it as fallback when no filter event types is provided [[#1875](https://github.com/falcosecurity/falco/pull/1875)] - [@FedeDP](https://github.com/FedeDP)
+* fix(build): do not show plugin options in musl optimized builds [[#1871](https://github.com/falcosecurity/falco/pull/1871)] - [@LucaGuerra](https://github.com/LucaGuerra)
+* fix(aws_cloudtrail_rules.yaml): correct required plugin versions [[#1867](https://github.com/falcosecurity/falco/pull/1867)] - [@FedeDP](https://github.com/FedeDP)
+* docs: fix priority level "info" to "informational" [[#1858](https://github.com/falcosecurity/falco/pull/1858)] - [@Andreagit97](https://github.com/Andreagit97)
+* Field properties changes [[#1838](https://github.com/falcosecurity/falco/pull/1838)] - [@mstemm](https://github.com/mstemm)
+* update(build): updated libs to latest master version; updated plugins versions [[#1856](https://github.com/falcosecurity/falco/pull/1856)] - [@FedeDP](https://github.com/FedeDP)
+* Add Giant Swarm to Adopters list [[#1842](https://github.com/falcosecurity/falco/pull/1842)] - [@stone-z](https://github.com/stone-z)
+* update(tests): remove `token_bucket` unit tests [[#1798](https://github.com/falcosecurity/falco/pull/1798)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* fix(build): use consistent 7-character build abbrev sha [[#1830](https://github.com/falcosecurity/falco/pull/1830)] - [@LucaGuerra](https://github.com/LucaGuerra)
+* add Phoenix to adopters list [[#1806](https://github.com/falcosecurity/falco/pull/1806)] - [@kaldyka](https://github.com/kaldyka)
+* remove unused files in test directory [[#1801](https://github.com/falcosecurity/falco/pull/1801)] - [@jasondellaluce](https://github.com/jasondellaluce)
+* drop Falco luajit module, use the one provided by libs [[#1788](https://github.com/falcosecurity/falco/pull/1788)] - [@FedeDP](https://github.com/FedeDP)
+* chore(build): update libs version to 7906f7e [[#1790](https://github.com/falcosecurity/falco/pull/1790)] - [@LucaGuerra](https://github.com/LucaGuerra)
+* Add SysFlow to list of libs adopters [[#1747](https://github.com/falcosecurity/falco/pull/1747)] - [@araujof](https://github.com/araujof)
+* build: dropped centos8 circleci build because it is useless [[#1882](https://github.com/falcosecurity/falco/pull/1882)] - [@FedeDP](https://github.com/FedeDP)
+
+
 ## v0.30.0
 
 Released on 2021-10-01
@@ -251,8 +396,8 @@ Released on 2021-01-18
 * docs(proposals): Exceptions handling proposal [[#1376](https://github.com/falcosecurity/falco/pull/1376)] - [@mstemm](https://github.com/mstemm)
 * docs: fix a broken link of README [[#1516](https://github.com/falcosecurity/falco/pull/1516)] - [@oke-py](https://github.com/oke-py)
 * docs: adding the kubernetes privileged use case to use cases [[#1484](https://github.com/falcosecurity/falco/pull/1484)] - [@fntlnz](https://github.com/fntlnz)
-* rules(Mkdir binary dirs): Adds exe_running_docker_save as an exception as this rules can be triggerred when a container is created. [[#1386](https://github.com/falcosecurity/falco/pull/1386)] - [@jhwbarlow](https://github.com/jhwbarlow)
-* rules(Create Hidden Files): Adds exe_running_docker_save as an exception as this rules can be triggerred when a container is created. [[#1386](https://github.com/falcosecurity/falco/pull/1386)] - [@jhwbarlow](https://github.com/jhwbarlow)
+* rules(Mkdir binary dirs): Adds exe_running_docker_save as an exception as this rules can be triggered when a container is created. [[#1386](https://github.com/falcosecurity/falco/pull/1386)] - [@jhwbarlow](https://github.com/jhwbarlow)
+* rules(Create Hidden Files): Adds exe_running_docker_save as an exception as this rules can be triggered when a container is created. [[#1386](https://github.com/falcosecurity/falco/pull/1386)] - [@jhwbarlow](https://github.com/jhwbarlow)
 * docs(.circleci): welcome Jonah (Amazon) as a new Falco CI maintainer [[#1518](https://github.com/falcosecurity/falco/pull/1518)] - [@leodido](https://github.com/leodido)
 * build: falcosecurity/falco:master also available on the AWS ECR Public registry [[#1512](https://github.com/falcosecurity/falco/pull/1512)] - [@leodido](https://github.com/leodido)
 * build: falcosecurity/falco:latest also available on the AWS ECR Public registry [[#1512](https://github.com/falcosecurity/falco/pull/1512)] - [@leodido](https://github.com/leodido)
@@ -701,7 +846,7 @@ Released on 2020-01-23
 ### Bug Fixes
 
 * fix: providing clang into docker-builder [[#972](https://github.com/falcosecurity/falco/pull/972)]
-* fix: prevent throwing json type error c++ exceptions outside of the falco engine when procesing k8s audit events. [[#928](https://github.com/falcosecurity/falco/pull/928)]
+* fix: prevent throwing json type error c++ exceptions outside of the falco engine when processing k8s audit events. [[#928](https://github.com/falcosecurity/falco/pull/928)]
 * fix(docker/kernel/linuxkit): correct from for falco minimal image [[#913](https://github.com/falcosecurity/falco/pull/913)]
 
 ### Rule Changes
@@ -816,7 +961,7 @@ Released 2019-07-31
 
 * Fix a problem that would cause prevent container metadata lookups when falco was daemonized [[#731](https://github.com/falcosecurity/falco/pull/731)]
 
-* Allow rule priorites to be expressed as lowercase and a mix of lower/uppercase [[#737](https://github.com/falcosecurity/falco/pull/737)]
+* Allow rule priorities to be expressed as lowercase and a mix of lower/uppercase [[#737](https://github.com/falcosecurity/falco/pull/737)]
 
 ### Rule Changes
 
@@ -1011,7 +1156,7 @@ Released 2019-05-13
 
 * Docker-based builder/tester: You can now build Falco using the [falco-builder](https://falco.org/docs/source/#build-using-falco-builder-container) docker image, and run regression tests using the [falco-tester](https://falco.org/docs/source/#test-using-falco-tester-container) docker image. [[#522](https://github.com/falcosecurity/falco/pull/522)] [[#584](https://github.com/falcosecurity/falco/pull/584)]
 
-* Several small docs changes to improve clarity and readibility [[#524](https://github.com/falcosecurity/falco/pull/524)] [[#540](https://github.com/falcosecurity/falco/pull/540)] [[#541](https://github.com/falcosecurity/falco/pull/541)] [[#542](https://github.com/falcosecurity/falco/pull/542)]
+* Several small docs changes to improve clarity and readability [[#524](https://github.com/falcosecurity/falco/pull/524)] [[#540](https://github.com/falcosecurity/falco/pull/540)] [[#541](https://github.com/falcosecurity/falco/pull/541)] [[#542](https://github.com/falcosecurity/falco/pull/542)]
 
 * Add instructions on how to enable K8s Audit Logging for kops [[#535](https://github.com/falcosecurity/falco/pull/535)]
 
@@ -1126,7 +1271,7 @@ Released 2019-01-16
 
 * Fix FPs related to `apt-config`/`apt-cache`, `apk` [[#490](https://github.com/falcosecurity/falco/pull/490)]
 
-* New rules `Launch Package Management Process in Container`, `Netcat Remote Code Execution in Container`, `Lauch Suspicious Network Tool in Container` look for host-level network tools like `netcat`, package management tools like `apt-get`, or network tool binaries being run in a container. [[#490](https://github.com/falcosecurity/falco/pull/490)]
+* New rules `Launch Package Management Process in Container`, `Netcat Remote Code Execution in Container`, `Launch Suspicious Network Tool in Container` look for host-level network tools like `netcat`, package management tools like `apt-get`, or network tool binaries being run in a container. [[#490](https://github.com/falcosecurity/falco/pull/490)]
 
 * Fix the `inbound` and `outbound` macros so they work with sendto/recvfrom/sendmsg/recvmsg. [[#470](https://github.com/falcosecurity/falco/pull/470)]
 
@@ -1159,7 +1304,7 @@ Released 2018-11-09
 
 * Better coverage (e.g. reduced FPs) for critical stack, hids systems, ufw, cloud-init, etc. [[#445](https://github.com/falcosecurity/falco/pull/445)]
 
-* New rules `Launch Package Management Process in Container`, `Netcat Remote Code Execution in Container`, and `Lauch Suspicious Network Tool in Container` look for running various suspicious programs in a container. [[#461](https://github.com/falcosecurity/falco/pull/461)]
+* New rules `Launch Package Management Process in Container`, `Netcat Remote Code Execution in Container`, and `Launch Suspicious Network Tool in Container` look for running various suspicious programs in a container. [[#461](https://github.com/falcosecurity/falco/pull/461)]
 
 * Misc changes to address false positives in GKE, Istio, etc. [[#455](https://github.com/falcosecurity/falco/pull/455)] [[#439](https://github.com/falcosecurity/falco/issues/439)]
 
@@ -1214,7 +1359,7 @@ Released 2018-07-24
 
 ### Minor Changes
 
-* Rules may now have an `skip-if-unknown-filter` property. If set to true, a rule will be skipped if its condition/output property refers to a filtercheck (e.g. `fd.some-new-attibute`) that is not present in the current falco version. [[#364](https://github.com/draios/falco/pull/364)] [[#345](https://github.com/draios/falco/issues/345)]
+* Rules may now have an `skip-if-unknown-filter` property. If set to true, a rule will be skipped if its condition/output property refers to a filtercheck (e.g. `fd.some-new-attribute`) that is not present in the current falco version. [[#364](https://github.com/draios/falco/pull/364)] [[#345](https://github.com/draios/falco/issues/345)]
 * Small changes to Falco `COPYING` file so github automatically recognizes license [[#380](https://github.com/draios/falco/pull/380)]
 * New example integration showing how to connect Falco with Anchore to dynamically create falco rules based on negative scan results [[#390](https://github.com/draios/falco/pull/390)]
 * New example integration showing how to connect Falco, [nats](https://nats.io/), and K8s to run flexible "playbooks" based on Falco events [[#389](https://github.com/draios/falco/pull/389)]
@@ -1315,7 +1460,7 @@ Released 2017-10-10
 
 Released 2017-10-10
 
-**Important**: the location for falco's configuration file has moved from `/etc/falco.yaml` to `/etc/falco/falco.yaml`. The default rules file has moved from `/etc/falco_rules.yaml` to `/etc/falco/falco_rules.yaml`. In addition, 0.8.0 has added a _local_ ruls file to `/etc/falco/falco_rules.local.yaml`. See [the documentation](https://github.com/draios/falco/wiki/Falco-Default-and-Local-Rules-Files) for more details.
+**Important**: the location for falco's configuration file has moved from `/etc/falco.yaml` to `/etc/falco/falco.yaml`. The default rules file has moved from `/etc/falco_rules.yaml` to `/etc/falco/falco_rules.yaml`. In addition, 0.8.0 has added a _local_ rules file to `/etc/falco/falco_rules.local.yaml`. See [the documentation](https://github.com/draios/falco/wiki/Falco-Default-and-Local-Rules-Files) for more details.
 
 ### Major Changes
 

CMakeLists.txt

@@ -58,6 +58,7 @@ if(CMAKE_BUILD_TYPE STREQUAL "debug")
 else()
   set(CMAKE_BUILD_TYPE "release")
   set(KBUILD_FLAGS "${DRAIOS_FEATURE_FLAGS}")
+  add_definitions(-DBUILD_TYPE_RELEASE)
 endif()
 message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
 
@@ -67,6 +68,7 @@ endif()
 
 if(MUSL_OPTIMIZED_BUILD)
   set(MUSL_FLAGS "-static -Os -fPIE -pie")
+  add_definitions(-DMUSL_OPTIMIZED)
 endif()
 
 # explicitly set hardening flags
@@ -97,8 +99,8 @@ set(CMAKE_CXX_FLAGS_RELEASE "-O3 -fno-strict-aliasing -DNDEBUG")
 include(GetFalcoVersion)
 
 set(PACKAGE_NAME "falco")
-set(PROBE_NAME "falco")
-set(PROBE_DEVICE_NAME "falco")
+set(DRIVER_NAME "falco")
+set(DRIVER_DEVICE_NAME "falco")
 set(DRIVERS_REPO "https://download.falco.org/driver")
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
   set(CMAKE_INSTALL_PREFIX
@@ -148,6 +150,8 @@ if(NOT MINIMAL_BUILD)
   include(civetweb)
 endif()
 
+include(cxxopts)
+
 # Lpeg
 include(lpeg)
 
@@ -206,7 +210,9 @@ add_subdirectory(userspace/engine)
 add_subdirectory(userspace/falco)
 add_subdirectory(tests)
 
-include(plugins)
+if(NOT MUSL_OPTIMIZED_BUILD)
+  include(plugins)
+endif()
 
 # Packages configuration
 include(CPackConfig)

RELEASE.md

@@ -95,7 +95,7 @@ Now assume `x.y.z` is the new version.
 
     #### Release Manager <github handle>
 
-    <!-- Substitute Github handle with the release manager's one -->
+    <!-- Substitute GitHub handle with the release manager's one -->
     ```
 
 - Finally, publish the release!

brand/README.md

@@ -56,7 +56,7 @@ If a rule has been violated, Falco triggers an alert.
 ### How does Falco work?
 
 Falco traces kernel events and reports information about the system calls being executed at runtime.
-Falco leverages the extended berkley packet filter (eBPF) which is a kernel feature implemented for dynamic crash-resilient and secure code execution in the kernel. 
+Falco leverages the extended berkeley packet filter (eBPF) which is a kernel feature implemented for dynamic crash-resilient and secure code execution in the kernel. 
 Falco enriches these kernel events with information about containers running on the system.
 Falco also can consume signals from other input streams such as the containerd socket, the Kubernetes API server and the Kubernetes audit log.
 At runtime, Falco will reason about these events and assert them against configured security rules.
@@ -113,7 +113,7 @@ Falco ultimately is a security engine. It reasons about signals coming from a sy
 
 ##### Anomaly detection
 
-This refers to an event that occurs with something unsual, concerning, or odd occurs.
+This refers to an event that occurs with something unusual, concerning, or odd occurs.
 We can associate anomalies with unwanted behavior, and alert in their presence.
 
 ##### Detection tooling

cmake/modules/CatchAddTests.cmake

@@ -45,7 +45,7 @@ string(REPLACE "\n" ";" output "${output}")
 # Parse output
 foreach(line ${output})
   set(test ${line})
-  # use escape commas to handle properly test cases with commans inside the name
+  # use escape commas to handle properly test cases with commands inside the name
   string(REPLACE "," "\\," test_name ${test})
   # ...and add to script
   add_command(add_test "${prefix}${test}${suffix}" ${TEST_EXECUTOR} "${TEST_EXECUTABLE}" "${test_name}" ${extra_args})

cmake/modules/DownloadStringViewLite.cmake

@@ -24,6 +24,7 @@ ExternalProject_Add(
   GIT_TAG "v1.4.0"
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
+  UPDATE_COMMAND ""
   INSTALL_COMMAND
     ${CMAKE_COMMAND} -E copy ${STRING_VIEW_LITE_PREFIX}/src/string-view-lite/include/nonstd/string_view.hpp
     ${STRING_VIEW_LITE_INCLUDE}/nonstd/string_view.hpp)

cmake/modules/civetweb.cmake

@@ -12,8 +12,8 @@
 #
 
 set(CIVETWEB_SRC "${PROJECT_BINARY_DIR}/civetweb-prefix/src/civetweb/")
-set(CIVETWEB_LIB "${CIVETWEB_SRC}/install/${CMAKE_INSTALL_LIBDIR}/libcivetweb.a")
-SET(CIVETWEB_CPP_LIB "${CIVETWEB_SRC}/install/${CMAKE_INSTALL_LIBDIR}/libcivetweb-cpp.a")
+set(CIVETWEB_LIB "${CIVETWEB_SRC}/install/lib/libcivetweb.a")
+SET(CIVETWEB_CPP_LIB "${CIVETWEB_SRC}/install/lib/libcivetweb-cpp.a")
 set(CIVETWEB_INCLUDE_DIR "${CIVETWEB_SRC}/install/include")
 message(STATUS "Using bundled civetweb in '${CIVETWEB_SRC}'")
 if (USE_BUNDLED_OPENSSL)
@@ -25,6 +25,7 @@ if (USE_BUNDLED_OPENSSL)
             INSTALL_DIR ${CIVETWEB_SRC}/install
             CMAKE_ARGS
             -DBUILD_TESTING=off
+            -DCMAKE_INSTALL_LIBDIR=lib
             -DCIVETWEB_BUILD_TESTING=off
             -DCIVETWEB_ENABLE_CXX=on
             -DCIVETWEB_ENABLE_SERVER_EXECUTABLE=off

cmake/modules/copy_files_to_build_dir.cmake

@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2022 The Falco Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+
+function(copy_files_to_build_dir source_files targetsuffix)
+
+  set(build_files)
+
+  foreach(file_path ${source_files})
+	  get_filename_component(trace_file ${file_path} NAME)
+	  list(APPEND build_files ${CMAKE_CURRENT_BINARY_DIR}/${trace_file})
+  endforeach()
+
+  add_custom_target(copy-files-${targetsuffix} ALL
+	  DEPENDS ${build_files})
+
+  add_custom_command(OUTPUT ${build_files}
+	  COMMAND ${CMAKE_COMMAND} -E copy_if_different ${source_files} ${CMAKE_CURRENT_BINARY_DIR}
+	  DEPENDS ${source_files})
+
+endfunction()

cmake/modules/cxxopts.cmake

@@ -0,0 +1,23 @@
+#
+# Copyright (C) 2022 The Falco Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+
+set(CXXOPTS_SRC "${PROJECT_BINARY_DIR}/cxxopts-prefix/src/cxxopts/")
+set(CXXOPTS_INCLUDE_DIR "${CXXOPTS_SRC}/include")
+
+ExternalProject_Add(
+        cxxopts
+        URL "https://github.com/jarro2783/cxxopts/archive/refs/tags/v3.0.0.tar.gz"
+        URL_HASH "SHA256=36f41fa2a46b3c1466613b63f3fa73dc24d912bc90d667147f1e43215a8c6d00"
+	CONFIGURE_COMMAND ""
+	BUILD_COMMAND ""
+	INSTALL_COMMAND "")

cmake/modules/falcosecurity-libs.cmake

@@ -24,8 +24,8 @@ else()
   # default below In case you want to test against another falcosecurity/libs version just pass the variable - ie., `cmake
   # -DFALCOSECURITY_LIBS_VERSION=dev ..`
   if(NOT FALCOSECURITY_LIBS_VERSION)
-    set(FALCOSECURITY_LIBS_VERSION "4de7ad2857fb55439eb10455aacd1d262b70551b")
-    set(FALCOSECURITY_LIBS_CHECKSUM "SHA256=3769e410fc0e31d5c7c37f33a7a73dfe52418a850d8f166fbafc67a723c619b6")
+    set(FALCOSECURITY_LIBS_VERSION "b7eb0dd65226a8dc254d228c8d950d07bf3521d2")
+    set(FALCOSECURITY_LIBS_CHECKSUM "SHA256=0f6dcdc3b94243c91294698ee343806539af81c5b33c60c6acf83fc1aa455e85")
   endif()
 
   # cd /path/to/build && cmake /path/to/source
@@ -47,8 +47,8 @@ if(MUSL_OPTIMIZED_BUILD)
   add_definitions(-DMUSL_OPTIMIZED)
 endif()
 
-set(PROBE_VERSION "${FALCOSECURITY_LIBS_VERSION}")
-set(PROBE_NAME "falco")
+set(DRIVER_VERSION "${FALCOSECURITY_LIBS_VERSION}")
+set(DRIVER_NAME "falco")
 set(DRIVER_PACKAGE_NAME "falco")
 set(SCAP_BPF_PROBE_ENV_VAR_NAME "FALCO_BPF_PROBE")
 set(SCAP_HOST_ROOT_ENV_VAR_NAME "HOST_ROOT")

cmake/modules/plugins.cmake

@@ -13,10 +13,12 @@
 
 include(ExternalProject)
 
+string(TOLOWER ${CMAKE_HOST_SYSTEM_NAME} PLUGINS_SYSTEM_NAME)
+
 ExternalProject_Add(
   cloudtrail-plugin
-  URL "https://download.falco.org/plugins/stable/cloudtrail-0.2.0-${CMAKE_HOST_SYSTEM_PROCESSOR}.tar.gz"
-  URL_HASH "SHA256=917ebc5c3b1ad78d959372baa73ac2e9b18b38f51e1e42bd0974166dc04a964c"
+  URL "https://download.falco.org/plugins/stable/cloudtrail-0.2.3-${PLUGINS_SYSTEM_NAME}-${CMAKE_HOST_SYSTEM_PROCESSOR}.tar.gz"
+  URL_HASH "SHA256=3dfce36f37a4f834b6078c6b78776414472a6ee775e8f262535313cc4031d0b7"
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
   INSTALL_COMMAND "")
@@ -25,8 +27,8 @@ install(FILES "${PROJECT_BINARY_DIR}/cloudtrail-plugin-prefix/src/cloudtrail-plu
 
 ExternalProject_Add(
   json-plugin
-  URL "https://download.falco.org/plugins/stable/json-0.2.0-${CMAKE_HOST_SYSTEM_PROCESSOR}.tar.gz"
-  URL_HASH "SHA256=250f0b04db7ab08f3bfa5ecd90cc9b39a6992fc2e96b887ed6f319a6ba156fd7"
+  URL "https://download.falco.org/plugins/stable/json-0.2.2-${PLUGINS_SYSTEM_NAME}-${CMAKE_HOST_SYSTEM_PROCESSOR}.tar.gz"
+  URL_HASH "SHA256=83eb411c9f2125695875b229c6e7974e6a4cc7f028be146b79d26db30372af5e"
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
   INSTALL_COMMAND "")

docker/local/rules/CMakeLists.txt

@@ -1,13 +1,7 @@
+include(copy_files_to_build_dir)
+
 # Note: list of rules is created at cmake time, not build time
 file(GLOB test_rule_files
 	"${CMAKE_CURRENT_SOURCE_DIR}/../../../test/rules/*.yaml")
 
-foreach(rule_file_path ${test_rule_files})
-	get_filename_component(rule_file ${rule_file_path} NAME)
-	add_custom_target(docker-local-rule-${rule_file} ALL
-		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${rule_file})
-	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${rule_file}
-		COMMAND ${CMAKE_COMMAND} -E copy ${rule_file_path} ${CMAKE_CURRENT_BINARY_DIR}/${rule_file}
-		DEPENDS ${rule_file_path})
-endforeach()
-
+copy_files_to_build_dir("${test_rule_files}" docker-local-rules)

docker/local/traces/CMakeLists.txt

@@ -1,13 +1,7 @@
+include(copy_files_to_build_dir)
+
 # Note: list of traces is created at cmake time, not build time
 file(GLOB test_trace_files
 	"${CMAKE_CURRENT_SOURCE_DIR}/../../../test/trace_files/*.scap")
 
-foreach(trace_file_path ${test_trace_files})
-	get_filename_component(trace_file ${trace_file_path} NAME)
-	add_custom_target(docker-local-trace-${trace_file} ALL
-		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${trace_file})
-	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		COMMAND ${CMAKE_COMMAND} -E copy ${trace_file_path} ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		DEPENDS ${trace_file_path})
-endforeach()
-
+copy_files_to_build_dir("${test_trace_files}" docker-local-traces)

falco.yaml

@@ -92,7 +92,7 @@ log_level: info
 # Minimum rule priority level to load and run. All rules having a
 # priority more severe than this level will be loaded/run.  Can be one
 # of "emergency", "alert", "critical", "error", "warning", "notice",
-# "info", "debug".
+# "informational", "debug".
 priority: debug
 
 # Whether or not output to any of the output channels below is
@@ -246,6 +246,7 @@ program_output:
 http_output:
   enabled: false
   url: http://some.url
+  user_agent: "falcosecurity/falco"
 
 # Falco supports running a gRPC server with two main binding types
 # 1. Over the network with mandatory mutual TLS authentication (mTLS)

proposals/20190909-psp-rules-support.md

@@ -27,7 +27,7 @@ That's where Falco comes in. We want to make it possible for Falco to perform a
 
 Transparently read a candidate PSP into an equivalent set of Falco rules that can look for the conditions in the PSP.
 
-The PSP is converted into a set of Falco rules which can be either saved as a file for later use/inspection, or loaded directly so they they can monitor system calls and k8s audit activity.
+The PSP is converted into a set of Falco rules which can be either saved as a file for later use/inspection, or loaded directly so that they can monitor system calls and k8s audit activity.
 
 ### Non-Goals
 
@@ -51,6 +51,6 @@ No diagrams yet.
 
 * We'll use [inja](https://github.com/pantor/inja) as the templating engine.
 
-* For the most part, we can rely on the existing framework of rules, filter expressions, and output expressions that already exist in Falco. One significant change will be that filter fields can extract more than one "value" per event, and we'll need to define new operators to perform set comparisions betweeen values in an event and values in the comparison right-hand-side.
+* For the most part, we can rely on the existing framework of rules, filter expressions, and output expressions that already exist in Falco. One significant change will be that filter fields can extract more than one "value" per event, and we'll need to define new operators to perform set comparisons between values in an event and values in the comparison right-hand-side.
 
 * This will rely heavily on existing support for [K8s Audit Events](https://falco.org/docs/event-sources/kubernetes-audit/) in Falco.

proposals/20191030-api.md

@@ -6,13 +6,13 @@ This is a proposal to better structure the Falco API.
 
 The Falco API is a set of contracts describing how users can interacts with Falco.
 
-By definiing a set of interfaces the Falco Authors intend to decouple Falco from other softwares and data (eg., from the input sources) and, at the same time, make it more extensible.
+By defining a set of interfaces the Falco Authors intend to decouple Falco from other softwares and data (eg., from the input sources) and, at the same time, make it more extensible.
 
-Thus, this document intent is to propose a list of services that contistute the Falco API (targeting the first stable version of Falco, v1.0.0).
+Thus, this document intent is to propose a list of services that constitute the Falco API (targeting the first stable version of Falco, v1.0.0).
 
 ## Motivation
 
-We want to enable users to use thirdy-party clients to interface with Falco outputs, inputs, rules, and configurations.
+We want to enable users to use third-party clients to interface with Falco outputs, inputs, rules, and configurations.
 
 Such ability would enable the community to create a whole set of OSS tools, built on top of Falco.
 
@@ -94,7 +94,7 @@ This translates in having the following set of `proto` files.
     }
     ```
 
-- one or more `.proto` containing the commond models - ie., the already existing `schema.proto` containing source enum, etc.
+- one or more `.proto` containing the command models - ie., the already existing `schema.proto` containing source enum, etc.
 
     ```proto3
     # schema.proto

proposals/20191217-rules-naming-convention.md

@@ -36,7 +36,7 @@ There will be no intention to cover Falco rule syntax in this proposal.
 
 ### Use cases
 
-When new PRs are created in the area of rules, reviewers need to examine whether there are new rules, macros or lists are introduced. If yes, check wether follow the naming convention.
+When new PRs are created in the area of rules, reviewers need to examine whether there are new rules, macros or lists are introduced. If yes, check whether follow the naming convention.
 
 ### Diagrams
 

proposals/20200506-artifacts-scope-part-1.md

@@ -82,7 +82,7 @@ This is done as needed, and can best be measured by the need to cut a release an
 
 ### official support
 
-As the need for a project grows, it can ultimately achieve the highest and most coveted status within The Falco Project. "_Offical support_."
+As the need for a project grows, it can ultimately achieve the highest and most coveted status within The Falco Project. "_Official support_."
 
 The artifacts listed above are part of the official Falco release process. These artifact will be refined and amended by the [Part 2](./20200506-artifacts-scope-part-2.md).
 
@@ -111,4 +111,4 @@ Update documentation in [falco-website#184](https://github.com/falcosecurity/fal
 ### Adjusting projects
 
  - YAML manifest documentation to be moved to `contrib`
- - Minkube, Kind, Puppet, Ansible, etc documentation to be moved to `contrib`
+ - Minikube, Kind, Puppet, Ansible, etc documentation to be moved to `contrib`

proposals/20200828-structured-exception-handling.md

@@ -196,13 +196,13 @@ Exception values will most commonly be defined in rules with append: true. Here'
 
 A rule exception applies if for a given event, the fields in a rule.exception match all of the values in some exception.item. For example, if a program `apk` writes to a file below `/usr/lib/alpine`, the rule will not trigger, even if the condition is met.
 
-Notice that an item in a values list can be a list. This allows building exceptions with operators like "in", "pmatch", etc. that work on a list of items. The item can also be a name of an existing list. If not present surrounding parantheses will be added.
+Notice that an item in a values list can be a list. This allows building exceptions with operators like "in", "pmatch", etc. that work on a list of items. The item can also be a name of an existing list. If not present surrounding parentheses will be added.
 
 Finally, note that the structure of the values property differs between the items where fields is a list of fields (proc_writer/container_writer/proc_filenames) and when it is a single field (procs_only). This changes how the condition snippet is constructed.
 
 ### Implementation
 
-For exception items where the fields property is a list of field names, each exception can be thought of as an implicit "and not (field1 cmp1 val1 and field2 cmp2 val2 and...)" appended to the rule's condition. For exception items where the fields property is a single field name, the exception can be thought of as an implict "and not field cmp (val1, val2, ...)". In practice, that's how exceptions will be implemented.
+For exception items where the fields property is a list of field names, each exception can be thought of as an implicit "and not (field1 cmp1 val1 and field2 cmp2 val2 and...)" appended to the rule's condition. For exception items where the fields property is a single field name, the exception can be thought of as an implicit "and not field cmp (val1, val2, ...)". In practice, that's how exceptions will be implemented.
 
 When a rule is parsed, the original condition will be wrapped in an extra layer of parentheses and all exception values will be appended to the condition. For example, using the example above, the resulting condition will be:
 
@@ -214,7 +214,7 @@ When a rule is parsed, the original condition will be wrapped in an extra layer
 	(fd.filename in (python, go))))
 ```
 
-The exceptions are effectively syntatic sugar that allows expressing sets of exceptions in a concise way.
+The exceptions are effectively syntactic sugar that allows expressing sets of exceptions in a concise way.
 
 ### Advantages
 

proposals/20200901-artifacts-cleanup.md

@@ -2,7 +2,7 @@
 
 This document reflects when and how we clean up the Falco artifacts from their storage location.
 
-**Superseeded by**: [drivers-storage-s3 proposal](https://github.com/falcosecurity/falco/blob/master/proposals/20201025-drivers-storage-s3.md).
+**Superseded by**: [drivers-storage-s3 proposal](https://github.com/falcosecurity/falco/blob/master/proposals/20201025-drivers-storage-s3.md).
 
 ## Motivation
 
@@ -90,7 +90,7 @@ This way, assuming the number of prebuilt drivers does not skyrocket, we can rea
 
 Notice that, in case a Falco stable release will not depend on a new driver version, this means the last two driver versions will, in this case, cover more than the two Falco stable releases.
 
-### Archivation
+### Archiving
 
 Since the process of building drivers is time and resource consuming, this document also proposes to move the driver versions in other storage facilities.
 

proposals/20210501-plugin-system.md

@@ -66,7 +66,7 @@ Source plugins also provide an "id", which is globally unique and is used in cap
 
 An extractor plugin focuses only on field extraction from events generated by other plugins, or by the core libraries. It does *not* provide an event source, but can extract fields from other event sources. An example is json field extraction, where a plugin might be able to extract fields from arbitrary json payloads.
 
-An extractor plugin provides an optional set of event sources. When the framework receives an event with an event source in the plugin's set of event sources, fields in expressions/Falco outputs will be extracted from events using the plugin. An extractor plugin can also *not* name a set of event sources. In this case, fields will be extracted from *all* events, regardless of source. In this case, the exctractor plugin must detect the format of arbitrary payloads and be able to return NULL/no value when the payload is not supported.
+An extractor plugin provides an optional set of event sources. When the framework receives an event with an event source in the plugin's set of event sources, fields in expressions/Falco outputs will be extracted from events using the plugin. An extractor plugin can also *not* name a set of event sources. In this case, fields will be extracted from *all* events, regardless of source. In this case, the extractor plugin must detect the format of arbitrary payloads and be able to return NULL/no value when the payload is not supported.
 
 ### Support for Plugin Events in Capture Files.
 
@@ -91,7 +91,7 @@ The libraries will do everything possible to validate the data coming from the p
 
 ### Plugin/Event Source registries
 
-Every source plugin requires its own, unique plugin ID to interoperate with Falco and the other plugins. The plugin ID will be used by the libs to properly process incoming events (for example, when saving events to file and loading them back), and by plugins to unuambiguosly recognize their dependencies.
+Every source plugin requires its own, unique plugin ID to interoperate with Falco and the other plugins. The plugin ID will be used by the libs to properly process incoming events (for example, when saving events to file and loading them back), and by plugins to unambiguously recognize their dependencies.
 
 To facilitate the allocation and distribution of plugin IDs, we will require that plugin developers request IDs for their plugins to the Falco organization. The mechanism used for plugin allocation is not determined yet and will be discussed in the future.
 
@@ -474,7 +474,7 @@ typedef struct
 	// Return value: a json array of strings containing event
 	//   sources returned by a source plugin's get_event_source()
 	//   function.
-	// This function is optional--if NULL then the exctractor
+	// This function is optional--if NULL then the extractor
 	// plugin will receive every event.
 	//
 	char* (*get_extract_event_sources)();
@@ -526,7 +526,7 @@ We will also make a change to compile rules/macros/lists selectively based on th
 
 ### Handling Duplicate/Overlapping Fields in Plugins/Libraries Core
 
-At an initial glance, adding plugins introduces the possibility of tens/hundreds of new filtercheck fields that could potentially overlap/conflict. For example, what happens if a plugin defines a "proc.name" field? However, the notion of "event source" makes these potential conflicts managable.
+At an initial glance, adding plugins introduces the possibility of tens/hundreds of new filtercheck fields that could potentially overlap/conflict. For example, what happens if a plugin defines a "proc.name" field? However, the notion of "event source" makes these potential conflicts manageable.
 
 Remember that field extraction is always done in the context of an event, and each event can be mapped back to an event source. So we only need to ensure that filtercheck fields are distinct for a given event source. For example, it's perfectly valid for an AWS Cloudtrail plugin to define a proc.name field, as the events generated by that plugin are wholly separate from syscall events. For syscall events, the AWS Cloudtrail plugin is not involved and the core libraries extract the process name for the tid performing a syscall. For AWS Cloudtrail events, the core libraries are not involved in field extraction and is performed by the AWS Cloudtrail plugin instead.
 

rules/aws_cloudtrail_rules.yaml

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2019 The Falco Authors.
+# Copyright (C) 2022 The Falco Authors.
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,7 +22,9 @@
 # anything semver-compatible.
 - required_plugin_versions:
   - name: cloudtrail
-    version: 0.1.0
+    version: 0.2.3
+  - name: json
+    version: 0.2.2
 
 # Note that this rule is disabled by default. It's useful only to
 # verify that the cloudtrail plugin is sending events properly.  The
@@ -339,7 +341,7 @@
       json.value[/requestParameters/PublicAccessBlockConfiguration/BlockPublicAcls]=false or
       json.value[/requestParameters/PublicAccessBlockConfiguration/IgnorePublicAcls]=false)
   output:
-    A pulic access block for a bucket has been deleted
+    A public access block for a bucket has been deleted
     (requesting user=%ct.user,
      requesting IP=%ct.srcip,
      AWS region=%ct.region,

rules/falco_rules.yaml

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2020 The Falco Authors.
+# Copyright (C) 2022 The Falco Authors.
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -63,11 +63,14 @@
   condition: rename or remove
 
 - macro: spawned_process
-  condition: evt.type = execve and evt.dir=<
+  condition: evt.type in (execve, execveat) and evt.dir=<
 
 - macro: create_symlink
   condition: evt.type in (symlink, symlinkat) and evt.dir=<
 
+- macro: create_hardlink
+  condition: evt.type in (link, linkat) and evt.dir=<
+
 - macro: chmod
   condition: (evt.type in (chmod, fchmod, fchmodat) and evt.dir=<)
 
@@ -216,13 +219,13 @@
 - list: deb_binaries
   items: [dpkg, dpkg-preconfigu, dpkg-reconfigur, dpkg-divert, apt, apt-get, aptitude,
     frontend, preinst, add-apt-reposit, apt-auto-remova, apt-key,
-    apt-listchanges, unattended-upgr, apt-add-reposit, apt-config, apt-cache, apt.systemd.dai
+    apt-listchanges, unattended-upgr, apt-add-reposit, apt-cache, apt.systemd.dai
     ]
 
 # The truncated dpkg-preconfigu is intentional, process names are
 # truncated at the falcosecurity-libs level.
 - list: package_mgmt_binaries
-  items: [rpm_binaries, deb_binaries, update-alternat, gem, pip, pip3, sane-utils.post, alternatives, chef-client, apk, snapd]
+  items: [rpm_binaries, deb_binaries, update-alternat, gem, npm, pip, pip3, sane-utils.post, alternatives, chef-client, apk, snapd]
 
 - macro: package_mgmt_procs
   condition: proc.name in (package_mgmt_binaries)
@@ -561,7 +564,7 @@
 
 # Qualys seems to run a variety of shell subprocesses, at various
 # levels. This checks at a few levels without the cost of a full
-# proc.aname, which traverses the full parent heirarchy.
+# proc.aname, which traverses the full parent hierarchy.
 - macro: run_by_qualys
   condition: >
     (proc.pname=qualys-cloud-ag or
@@ -772,6 +775,9 @@
 - macro: centrify_writing_krb
   condition: (proc.name in (adjoin,addns) and fd.name startswith /etc/krb5)
 
+- macro: sssd_writing_krb
+  condition: (proc.name=adcli and proc.aname[2]=sssd and fd.name startswith /etc/krb5)
+
 - macro: cockpit_writing_conf
   condition: >
     ((proc.pname=cockpit-kube-la or proc.aname[2]=cockpit-kube-la)
@@ -1100,7 +1106,7 @@
   condition: (proc.name=oc and fd.name startswith /etc/origin/node)
 
 - macro: keepalived_writing_conf
-  condition: (proc.name=keepalived and fd.name=/etc/keepalived/keepalived.conf)
+  condition: (proc.name in (keepalived, kube-keepalived) and fd.name=/etc/keepalived/keepalived.conf)
 
 - macro: etcd_manager_updating_dns
   condition: (container and proc.name=etcd-manager and fd.name=/etc/hosts)
@@ -1215,6 +1221,7 @@
     and not nginx_writing_certs
     and not chef_client_writing_conf
     and not centrify_writing_krb
+    and not sssd_writing_krb
     and not cockpit_writing_conf
     and not ipsec_writing_conf
     and not httpd_writing_ssl_conf
@@ -1871,19 +1878,6 @@
               container.image.repository in (falco_sensitive_mount_images) or
               container.image.repository startswith quay.io/sysdig/)
 
-# These container images are allowed to run with hostnetwork=true
-- list: falco_hostnetwork_images
-  items: [
-    gcr.io/google-containers/prometheus-to-sd,
-    gcr.io/projectcalico-org/typha,
-    gcr.io/projectcalico-org/node,
-    gke.gcr.io/gke-metadata-server,
-    gke.gcr.io/kube-proxy,
-    gke.gcr.io/netd-amd64,
-    k8s.gcr.io/ip-masq-agent-amd64
-    k8s.gcr.io/prometheus-to-sd,
-    ]
-
 # Add conditions to this macro (probably in a separate file,
 # overwriting this macro) to specify additional containers that are
 # allowed to perform sensitive mounts.
@@ -2199,7 +2193,7 @@
 #   output: "sshd sent error message to syslog (error=%evt.buffer)"
 #   priority: WARNING
 
-- macro: somebody_becoming_themself
+- macro: somebody_becoming_themselves
   condition: ((user.name=nobody and evt.arg.uid=nobody) or
               (user.name=www-data and evt.arg.uid=www-data) or
               (user.name=_apt and evt.arg.uid=_apt) or
@@ -2237,7 +2231,7 @@
     evt.type=setuid and evt.dir=>
     and (known_user_in_container or not container)
     and not (user.name=root or user.uid=0)
-    and not somebody_becoming_themself
+    and not somebody_becoming_themselves
     and not proc.name in (known_setuid_binaries, userexec_binaries, mail_binaries, docker_binaries,
                           nomachine_binaries)
     and not proc.name startswith "runc:"
@@ -2261,7 +2255,7 @@
     activity by any programs that can manage users, passwords, or permissions. sudo and su are excluded.
     Activity in containers is also excluded--some containers create custom users on top
     of a base linux distribution at startup.
-    Some innocuous commandlines that don't actually change anything are excluded.
+    Some innocuous command lines that don't actually change anything are excluded.
   condition: >
     spawned_process and proc.name in (user_mgmt_binaries) and
     not proc.name in (su, sudo, lastlog, nologin, unix_chkpwd) and not container and
@@ -2311,7 +2305,7 @@
 # explicitly enumerate the container images that you want to allow
 # access to EC2 metadata. In this main falco rules file, there isn't
 # any way to know all the containers that should have access, so any
-# container is alllowed, by repeating the "container" macro. In the
+# container is allowed, by repeating the "container" macro. In the
 # overridden macro, the condition would look something like
 # (container.image.repository = vendor/container-1 or
 # container.image.repository = vendor/container-2 or ...)
@@ -2574,15 +2568,15 @@
   condition: >
     (modify and (
       evt.arg.name contains "bash_history" or
-      evt.arg.name contains "zsh_history" or
+      evt.arg.name endswith "zsh_history" or
       evt.arg.name contains "fish_read_history" or
       evt.arg.name endswith "fish_history" or
       evt.arg.oldpath contains "bash_history" or
-      evt.arg.oldpath contains "zsh_history" or
+      evt.arg.oldpath endswith "zsh_history" or
       evt.arg.oldpath contains "fish_read_history" or
       evt.arg.oldpath endswith "fish_history" or
       evt.arg.path contains "bash_history" or
-      evt.arg.path contains "zsh_history" or
+      evt.arg.path endswith "zsh_history" or
       evt.arg.path contains "fish_read_history" or
       evt.arg.path endswith "fish_history"))
 
@@ -2590,7 +2584,7 @@
   condition: >
     (open_write and (
       fd.name contains "bash_history" or
-      fd.name contains "zsh_history" or
+      fd.name endswith "zsh_history" or
       fd.name contains "fish_read_history" or
       fd.name endswith "fish_history") and evt.arg.flags contains "O_TRUNC")
 
@@ -2629,7 +2623,7 @@
   items: [hyperkube, kubelet, k3s-agent]
 
 # This macro should be overridden in user rules as needed. This is useful if a given application
-# should not be ignored alltogether with the user_known_chmod_applications list, but only in
+# should not be ignored altogether with the user_known_chmod_applications list, but only in
 # specific conditions.
 - macro: user_known_set_setuid_or_setgid_bit_conditions
   condition: (never_true)
@@ -2709,7 +2703,17 @@
     (evt.arg.target in (sensitive_file_names) or evt.arg.target in (sensitive_directory_names))
   output: >
     Symlinks created over sensitive files (user=%user.name user_loginuid=%user.loginuid command=%proc.cmdline target=%evt.arg.target linkpath=%evt.arg.linkpath parent_process=%proc.pname)
-  priority: NOTICE
+  priority: WARNING
+  tags: [file, mitre_exfiltration]
+
+- rule: Create Hardlink Over Sensitive Files
+  desc: Detect hardlink created over sensitive files
+  condition: >
+    create_hardlink and
+    (evt.arg.oldpath in (sensitive_file_names))
+  output: >
+    Hardlinks created over sensitive files (user=%user.name user_loginuid=%user.loginuid command=%proc.cmdline target=%evt.arg.oldpath linkpath=%evt.arg.newpath parent_process=%proc.pname)
+  priority: WARNING
   tags: [file, mitre_exfiltration]
 
 - list: miner_ports
@@ -2814,13 +2818,13 @@
   desc: Miners typically connect to miner pools on common ports.
   condition: net_miner_pool and not trusted_images_query_miner_domain_dns
   enabled: false
-  output: Outbound connection to IP/Port flagged by cryptoioc.ch (command=%proc.cmdline port=%fd.rport ip=%fd.rip container=%container.info image=%container.image.repository)
+  output: Outbound connection to IP/Port flagged by https://cryptoioc.ch (command=%proc.cmdline port=%fd.rport ip=%fd.rip container=%container.info image=%container.image.repository)
   priority: CRITICAL
   tags: [network, mitre_execution]
 
 - rule: Detect crypto miners using the Stratum protocol
   desc: Miners typically specify the mining pool to connect to with a URI that begins with 'stratum+tcp'
-  condition: spawned_process and proc.cmdline contains "stratum+tcp"
+  condition: spawned_process and (proc.cmdline contains "stratum+tcp" or proc.cmdline contains "stratum2+tcp" or proc.cmdline contains "stratum+ssl" or proc.cmdline contains "stratum2+ssl")
   output: Possible miner running (command=%proc.cmdline container=%container.info image=%container.image.repository)
   priority: CRITICAL
   tags: [process, mitre_execution]
@@ -3039,7 +3043,7 @@
 # A privilege escalation to root through heap-based buffer overflow
 - rule: Sudo Potential Privilege Escalation
   desc: Privilege escalation vulnerability affecting sudo (<= 1.9.5p2). Executing sudo using sudoedit -s or sudoedit -i command with command-line argument that ends with a single backslash character from an unprivileged user it's possible to elevate the user privileges to root.
-  condition: spawned_process and user.uid != 0 and proc.name=sudoedit and (proc.args contains -s or proc.args contains -i) and (proc.args contains "\ " or proc.args endswith \)
+  condition: spawned_process and user.uid != 0 and (proc.name=sudoedit or proc.name = sudo) and (proc.args contains -s or proc.args contains -i or proc.args contains --login) and (proc.args contains "\ " or proc.args endswith \)
   output: "Detect Sudo Privilege Escalation Exploit (CVE-2021-3156) (user=%user.name parent=%proc.pname cmdline=%proc.cmdline %container.info)"
   priority: CRITICAL
   tags: [filesystem, mitre_privilege_escalation]
@@ -3058,7 +3062,7 @@
   condition: (proc.args="" or proc.args intersects ("-V", "-l", "-h"))
 
 - rule: Mount Launched in Privileged Container
-  desc: Detect file system mount happened inside a privilegd container which might lead to container escape.
+  desc: Detect file system mount happened inside a privileged container which might lead to container escape.
   condition: >
     spawned_process and container
     and container.privileged=true
@@ -3120,7 +3124,17 @@
   priority: NOTICE
   tags: [network, process, mitre_command_and_control]
 
+# This rule helps detect CVE-2021-4034:
+# A privilege escalation to root through memory corruption
+- rule: Polkit Local Privilege Escalation Vulnerability (CVE-2021-4034)
+  desc: "This rule detects an attempt to exploit a privilege escalation vulnerability in Polkit's pkexec. By running specially crafted code, a local user can leverage this flaw to gain root privileges on a compromised system"
+  condition:
+    spawned_process and user.uid != 0 and proc.name=pkexec and proc.args = ''
+  output:
+    "Detect Polkit pkexec Local Privilege Escalation Exploit (CVE-2021-4034) (user=%user.loginname uid=%user.loginuid command=%proc.cmdline args=%proc.args)"
+  priority: CRITICAL
+  tags: [process, mitre_privilege_escalation]
+
 # Application rules have moved to application_rules.yaml. Please look
 # there if you want to enable them by adding to
 # falco_rules.local.yaml.
-

rules/k8s_audit_rules.yaml

@@ -152,6 +152,19 @@
   source: k8s_audit
   tags: [k8s]
 
+# These container images are allowed to run with hostnetwork=true
+- list: falco_hostnetwork_images
+  items: [
+    gcr.io/google-containers/prometheus-to-sd,
+    gcr.io/projectcalico-org/typha,
+    gcr.io/projectcalico-org/node,
+    gke.gcr.io/gke-metadata-server,
+    gke.gcr.io/kube-proxy,
+    gke.gcr.io/netd-amd64,
+    k8s.gcr.io/ip-masq-agent-amd64
+    k8s.gcr.io/prometheus-to-sd,
+    ]
+
 # Corresponds to K8s CIS Benchmark 1.7.4
 - rule: Create HostNetwork Pod
   desc: Detect an attempt to start a pod using the host network.
@@ -353,7 +366,7 @@
   tags: [k8s]
 
 # Detect any attempt to create a ClusterRoleBinding to the cluster-admin user
-# (exapand this to any built-in cluster role that does "sensitive" things)
+# (expand this to any built-in cluster role that does "sensitive" things)
 - rule: Attach to cluster-admin Role
   desc: Detect any attempt to create a ClusterRoleBinding to the cluster-admin user
   condition: kevt and clusterrolebinding and kcreate and ka.req.binding.role=cluster-admin
@@ -559,7 +572,7 @@
 # cluster creation. This may signify a permission setting too broader.
 # As we can't check for role of the user on a general ka.* event, this
 # may or may not be an administrator. Customize the full_admin_k8s_users
-# list to your needs, and activate at your discrection.
+# list to your needs, and activate at your discretion.
 
 # # How to test:
 # # Execute any kubectl command connected using default cluster user, as:

scripts/debian/postinst.in

@@ -18,7 +18,7 @@
 set -e
 
 DKMS_PACKAGE_NAME="@PACKAGE_NAME@"
-DKMS_VERSION="@PROBE_VERSION@"
+DKMS_VERSION="@DRIVER_VERSION@"
 NAME="@PACKAGE_NAME@"
 
 postinst_found=0

scripts/debian/prerm.in

@@ -18,7 +18,7 @@
 set -e
 
 DKMS_PACKAGE_NAME="@PACKAGE_NAME@"
-DKMS_VERSION="@PROBE_VERSION@"
+DKMS_VERSION="@DRIVER_VERSION@"
 
 case "$1" in
 	remove|upgrade|deconfigure)

scripts/falco-driver-loader

@@ -160,15 +160,26 @@ load_kernel_module_compile() {
 		echo "make CC=${CURRENT_GCC} \$@" >> /tmp/falco-dkms-make
 		chmod +x /tmp/falco-dkms-make
 		if dkms install --directive="MAKE='/tmp/falco-dkms-make'" -m "${DRIVER_NAME}" -v "${DRIVER_VERSION}" -k "${KERNEL_RELEASE}" 2>/dev/null; then
-			echo "* ${DRIVER_NAME} module installed in dkms, trying to insmod"
-			chcon -t modules_object_t "/var/lib/dkms/${DRIVER_NAME}/${DRIVER_VERSION}/${KERNEL_RELEASE}/${ARCH}/module/${DRIVER_NAME}.ko" > /dev/null 2>&1 || true
-			chcon -t modules_object_t "/var/lib/dkms/${DRIVER_NAME}/${DRIVER_VERSION}/${KERNEL_RELEASE}/${ARCH}/module/${DRIVER_NAME}.ko.xz" > /dev/null 2>&1 || true
-			if insmod "/var/lib/dkms/${DRIVER_NAME}/${DRIVER_VERSION}/${KERNEL_RELEASE}/${ARCH}/module/${DRIVER_NAME}.ko" > /dev/null 2>&1; then
+			echo "* ${DRIVER_NAME} module installed in dkms"
+			KO_FILE="/var/lib/dkms/${DRIVER_NAME}/${DRIVER_VERSION}/${KERNEL_RELEASE}/${ARCH}/module/${DRIVER_NAME}"
+			if [ -f "$KO_FILE.ko" ]; then
+				KO_FILE="$KO_FILE.ko"
+			elif [ -f "$KO_FILE.ko.gz" ]; then
+				KO_FILE="$KO_FILE.ko.gz"
+			elif [ -f "$KO_FILE.ko.xz" ]; then
+				KO_FILE="$KO_FILE.ko.xz"
+			elif [ -f "$KO_FILE.ko.zst" ]; then
+				KO_FILE="$KO_FILE.ko.zst"
+			else
+				>&2 echo "${DRIVER_NAME} module file not found"
+				return
+			fi
+			echo "* ${DRIVER_NAME} module found: ${KO_FILE}"
+			echo "* Trying insmod"
+			chcon -t modules_object_t "$KO_FILE" > /dev/null 2>&1 || true
+			if insmod "$KO_FILE" > /dev/null 2>&1; then
 				echo "* Success: ${DRIVER_NAME} module found and loaded in dkms"
 				exit 0
-			elif insmod "/var/lib/dkms/${DRIVER_NAME}/${DRIVER_VERSION}/${KERNEL_RELEASE}/${ARCH}/module/${DRIVER_NAME}.ko.xz" > /dev/null 2>&1; then
-				echo "* Success: ${DRIVER_NAME} module found and loaded in dkms (xz)"
-				exit 0
 			else
 				echo "* Unable to insmod ${DRIVER_NAME} module"
 			fi
@@ -196,8 +207,12 @@ load_kernel_module_download() {
 	if curl -L --create-dirs "${FALCO_DRIVER_CURL_OPTIONS}" -o "${HOME}/.falco/${FALCO_KERNEL_MODULE_FILENAME}" "${URL}"; then
 		echo "* Download succeeded"
 		chcon -t modules_object_t "${HOME}/.falco/${FALCO_KERNEL_MODULE_FILENAME}" > /dev/null 2>&1 || true
-		insmod "${HOME}/.falco/${FALCO_KERNEL_MODULE_FILENAME}" && echo "* Success: ${DRIVER_NAME} module found and inserted"
-		exit $?
+		if insmod "${HOME}/.falco/${FALCO_KERNEL_MODULE_FILENAME}"; then
+			echo "* Success: ${DRIVER_NAME} module found and inserted"
+			exit 0
+		else
+			>&2 echo "Unable to insmod the prebuilt ${DRIVER_NAME} module"
+		fi	
 	else
 		>&2 echo "Unable to find a prebuilt ${DRIVER_NAME} module"
 		return
@@ -241,11 +256,6 @@ load_kernel_module() {
 		exit 0
 	fi
 
-	echo "* Trying to load a system ${DRIVER_NAME} module, if present"
-	if modprobe "${DRIVER_NAME}" > /dev/null 2>&1; then
-		echo "* Success: ${DRIVER_NAME} module found and loaded with modprobe"
-		exit 0
-	fi
 
 	echo "* Looking for a ${DRIVER_NAME} module locally (kernel ${KERNEL_RELEASE})"
 
@@ -268,6 +278,13 @@ load_kernel_module() {
 		load_kernel_module_compile
 	fi
 
+	# Last try (might load a previous driver version)
+	echo "* Trying to load a system ${DRIVER_NAME} module, if present"
+	if modprobe "${DRIVER_NAME}" > /dev/null 2>&1; then
+		echo "* Success: ${DRIVER_NAME} module found and loaded with modprobe"
+		exit 0
+	fi
+
 	# Not able to download a prebuilt module nor to compile one on-the-fly
 	>&2 echo "Consider compiling your own ${DRIVER_NAME} driver and loading it or getting in touch with the Falco community"
 	exit 1
@@ -497,7 +514,7 @@ print_usage() {
 	echo "  --source-only  skip execution and allow sourcing in another script"
 	echo ""
 	echo "Environment variables:"
-	echo "  DRIVER_REPO              specify a different URL where to look for prebuilt Falco drivers"
+	echo "  DRIVERS_REPO             specify a different URL where to look for prebuilt Falco drivers"
 	echo "  DRIVER_NAME              specify a different name for the driver"
 	echo "  DRIVER_INSECURE_DOWNLOAD whether you want to allow insecure downloads or not"
 	echo ""
@@ -530,8 +547,8 @@ if [[ -z "$MAX_RMMOD_WAIT" ]]; then
 	MAX_RMMOD_WAIT=60
 fi
 
-DRIVER_VERSION="@PROBE_VERSION@"
-DRIVER_NAME=${DRIVER_NAME:-"@PROBE_NAME@"}
+DRIVER_VERSION="@DRIVER_VERSION@"
+DRIVER_NAME=${DRIVER_NAME:-"@DRIVER_NAME@"}
 FALCO_VERSION="@FALCO_VERSION@"
 
 DRIVER="module"

scripts/rpm/postinstall.in

@@ -15,7 +15,7 @@
 # limitations under the License.
 #
 
-mod_version="@PROBE_VERSION@"
+mod_version="@DRIVER_VERSION@"
 dkms add -m falco -v $mod_version --rpm_safe_upgrade
 if [ `uname -r | grep -c "BOOT"` -eq 0 ] && [ -e /lib/modules/`uname -r`/build/include ]; then
 	dkms build -m falco -v $mod_version

scripts/rpm/preuninstall.in

@@ -15,5 +15,5 @@
 # limitations under the License.
 #
 
-mod_version="@PROBE_VERSION@"
+mod_version="@DRIVER_VERSION@"
 dkms remove -m falco -v $mod_version --all --rpm_safe_upgrade

test/CMakeLists.txt

@@ -1,7 +1,4 @@
 add_subdirectory(trace_files)
 
-add_custom_target(test-trace-files ALL)
-add_dependencies(test-trace-files trace-files-base-scap trace-files-psp trace-files-k8s-audit trace-files-plugins)
-
 add_subdirectory(plugins)
 add_subdirectory(confs/plugins)

test/README.md

@@ -71,7 +71,7 @@ The `falco_traces.yaml` test suite gets generated through the `falco_traces.yaml
 
 ### falco_tests_package
 
-The `falco_tests_package.yaml` test suite requires some additional setup steps to be succesfully run on your local machine.
+The `falco_tests_package.yaml` test suite requires some additional setup steps to be successfully run on your local machine.
 
 In particular, it requires some runners (ie., docker images) to be already built and present into your local machine.
 

test/falco_k8s_audit_tests.yaml

@@ -49,6 +49,7 @@ trace_files: !mux
     detect: False
     rules_file:
       - ../rules/falco_rules.yaml
+      - ../rules/k8s_audit_rules.yaml
       - ./rules/k8s_audit/engine_v4_k8s_audit_rules.yaml
       - ./rules/k8s_audit/trust_nginx_container.yaml
     trace_file: trace_files/k8s_audit/create_nginx_pod_privileged.json
@@ -74,6 +75,7 @@ trace_files: !mux
     detect: False
     rules_file:
       - ../rules/falco_rules.yaml
+      - ../rules/k8s_audit_rules.yaml
       - ./rules/k8s_audit/engine_v4_k8s_audit_rules.yaml
       - ./rules/k8s_audit/trust_nginx_container.yaml
     trace_file: trace_files/k8s_audit/create_nginx_pod_hostnetwork.json

test/falco_test.py

@@ -524,10 +524,10 @@ class FalcoTest(Test):
                 ["md5sum", "/boot/config-{}".format(kernel_release)]).rstrip()
             config_hash = md5_output.split(" ")[0]
 
-            probe_filename = "falco-{}-{}-{}-{}.ko".format(
+            driver_filename = "falco-{}-{}-{}-{}.ko".format(
                 falco_version, arch, kernel_release, config_hash)
             driver_path = os.path.join(self.falcodir, "driver", "falco.ko")
-            module_path = os.path.join(self.module_dir, probe_filename)
+            module_path = os.path.join(self.module_dir, driver_filename)
             self.log.debug("Copying {} to {}".format(driver_path, module_path))
             shutil.copyfile(driver_path, module_path)
 

test/falco_tests.yaml

@@ -44,8 +44,8 @@ trace_files: !mux
       - not_equals_after_evttype: [execve]
       - not_after_evttype: [execve]
       - leading_trailing_evttypes: [execve,open]
-      - leading_multtrailing_evttypes: [connect,execve,open]
-      - leading_multtrailing_evttypes_using_in: [connect,execve,open]
+      - leading_multitrailing_evttypes: [connect,execve,open]
+      - leading_multitrailing_evttypes_using_in: [connect,execve,open]
       - not_equals_at_end: [all]
       - not_at_end: [all]
       - not_before_trailing_evttype: [all]

test/rules/falco_rules_warnings.yaml

@@ -56,13 +56,13 @@
   output: "None"
   priority: WARNING
 
-- rule: leading_multtrailing_evttypes
+- rule: leading_multitrailing_evttypes
   desc: one evttype at beginning, multiple at end
   condition: evt.type=execve and proc.name=foo or evt.type=open or evt.type=connect
   output: "None"
   priority: WARNING
 
-- rule: leading_multtrailing_evttypes_using_in
+- rule: leading_multitrailing_evttypes_using_in
   desc: one evttype at beginning, multiple at end, using in
   condition: evt.type=execve and proc.name=foo or evt.type in (open, connect)
   output: "None"

test/rules/k8s_audit/engine_v4_k8s_audit_rules.yaml

@@ -246,7 +246,7 @@
   tags: [k8s]
 
 # Detect any attempt to create a ClusterRoleBinding to the cluster-admin user
-# (exapand this to any built-in cluster role that does "sensitive" things)
+# (expand this to any built-in cluster role that does "sensitive" things)
 - rule: Attach to cluster-admin Role
   desc: Detect any attempt to create a ClusterRoleBinding to the cluster-admin user
   condition: kevt and clusterrolebinding and kcreate and ka.req.binding.role=cluster-admin

test/trace_files/CMakeLists.txt

@@ -2,19 +2,11 @@ add_subdirectory(k8s_audit)
 add_subdirectory(psp)
 add_subdirectory(plugins)
 
+include(copy_files_to_build_dir)
+
 # Note: list of traces is created at cmake time, not build time
 file(GLOB test_trace_files
 	"${CMAKE_CURRENT_SOURCE_DIR}/*.scap")
 
-foreach(trace_file_path ${test_trace_files})
-	get_filename_component(trace_file ${trace_file_path} NAME)
-	add_custom_target(test-trace-${trace_file} ALL
-		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${trace_file})
-	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		COMMAND ${CMAKE_COMMAND} -E copy ${trace_file_path} ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		DEPENDS ${trace_file_path})
-	list(APPEND BASE_SCAP_TRACE_FILES_TARGETS test-trace-${trace_file})
-endforeach()
+copy_files_to_build_dir("${test_trace_files}" base-scap)
 
-add_custom_target(trace-files-base-scap ALL)
-add_dependencies(trace-files-base-scap ${BASE_SCAP_TRACE_FILES_TARGETS})

test/trace_files/k8s_audit/CMakeLists.txt

@@ -1,16 +1,7 @@
+include(copy_files_to_build_dir)
+
 # Note: list of traces is created at cmake time, not build time
 file(GLOB test_trace_files
 	"${CMAKE_CURRENT_SOURCE_DIR}/*.json")
 
-foreach(trace_file_path ${test_trace_files})
-	get_filename_component(trace_file ${trace_file_path} NAME)
-	add_custom_target(test-trace-${trace_file} ALL
-		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${trace_file})
-	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		COMMAND ${CMAKE_COMMAND} -E copy ${trace_file_path} ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		DEPENDS ${trace_file_path})
-	list(APPEND K8S_AUDIT_TRACE_FILES_TARGETS test-trace-${trace_file})
-endforeach()
-
-add_custom_target(trace-files-k8s-audit ALL)
-add_dependencies(trace-files-k8s-audit ${K8S_AUDIT_TRACE_FILES_TARGETS})
+copy_files_to_build_dir("${test_trace_files}" k8s-audit)

test/trace_files/plugins/CMakeLists.txt

@@ -1,16 +1,7 @@
+include(copy_files_to_build_dir)
+
 # Note: list of traces is created at cmake time, not build time
 file(GLOB test_trace_files
 	"${CMAKE_CURRENT_SOURCE_DIR}/*.json")
 
-foreach(trace_file_path ${test_trace_files})
-	get_filename_component(trace_file ${trace_file_path} NAME)
-	add_custom_target(test-trace-${trace_file} ALL
-		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${trace_file})
-	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		COMMAND ${CMAKE_COMMAND} -E copy ${trace_file_path} ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		DEPENDS ${trace_file_path})
-	list(APPEND PLUGINS_TRACE_FILES_TARGETS test-trace-${trace_file})
-endforeach()
-
-add_custom_target(trace-files-plugins ALL)
-add_dependencies(trace-files-plugins ${PLUGINS_TRACE_FILES_TARGETS})
+copy_files_to_build_dir("${test_trace_files}" plugins)

test/trace_files/psp/CMakeLists.txt

@@ -1,17 +1,8 @@
+include(copy_files_to_build_dir)
+
 # Note: list of traces is created at cmake time, not build time
 file(GLOB test_trace_files
 	"${CMAKE_CURRENT_SOURCE_DIR}/*.json"
 	"${CMAKE_CURRENT_SOURCE_DIR}/*.scap")
 
-foreach(trace_file_path ${test_trace_files})
-	get_filename_component(trace_file ${trace_file_path} NAME)
-	add_custom_target(test-trace-${trace_file} ALL
-		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${trace_file})
-	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		COMMAND ${CMAKE_COMMAND} -E copy ${trace_file_path} ${CMAKE_CURRENT_BINARY_DIR}/${trace_file}
-		DEPENDS ${trace_file_path})
-	list(APPEND PSP_TRACE_FILES_TARGETS test-trace-${trace_file})
-endforeach()
-
-add_custom_target(trace-files-psp ALL)
-add_dependencies(trace-files-psp ${PSP_TRACE_FILES_TARGETS})
+copy_files_to_build_dir("${test_trace_files}" psp)

tests/engine/test_rulesets.cpp

@@ -42,8 +42,9 @@ TEST_CASE("Should enable/disable for exact match w/ default ruleset", "[rulesets
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("one_rule", exact_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -57,8 +58,9 @@ TEST_CASE("Should enable/disable for exact match w/ specific ruleset", "[ruleset
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("one_rule", exact_match, enabled, non_default_ruleset);
 	REQUIRE(r.num_rules_for_ruleset(non_default_ruleset) == 1);
@@ -76,8 +78,9 @@ TEST_CASE("Should not enable for exact match different rule name", "[rulesets]")
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("some_other_rule", exact_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 0);
@@ -88,8 +91,9 @@ TEST_CASE("Should enable/disable for exact match w/ substring and default rulese
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("one_rule", substring_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -103,8 +107,9 @@ TEST_CASE("Should not enable for substring w/ exact_match", "[rulesets]")
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("one_", exact_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 0);
@@ -115,8 +120,9 @@ TEST_CASE("Should enable/disable for prefix match w/ default ruleset", "[ruleset
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("one_", substring_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -130,8 +136,9 @@ TEST_CASE("Should enable/disable for suffix match w/ default ruleset", "[ruleset
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("_rule", substring_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -145,8 +152,9 @@ TEST_CASE("Should enable/disable for substring match w/ default ruleset", "[rule
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("ne_ru", substring_match, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -160,8 +168,9 @@ TEST_CASE("Should enable/disable for substring match w/ specific ruleset", "[rul
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable("ne_ru", substring_match, enabled, non_default_ruleset);
 	REQUIRE(r.num_rules_for_ruleset(non_default_ruleset) == 1);
@@ -179,9 +188,10 @@ TEST_CASE("Should enable/disable for tags w/ default ruleset", "[rulesets]")
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 	std::set<std::string> want_tags = {"some_tag"};
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable_tags(want_tags, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -195,9 +205,10 @@ TEST_CASE("Should enable/disable for tags w/ specific ruleset", "[rulesets]")
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 	std::set<std::string> want_tags = {"some_tag"};
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable_tags(want_tags, enabled, non_default_ruleset);
 	REQUIRE(r.num_rules_for_ruleset(non_default_ruleset) == 1);
@@ -215,9 +226,10 @@ TEST_CASE("Should not enable for different tags", "[rulesets]")
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 	std::set<std::string> want_tags = {"some_different_tag"};
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable_tags(want_tags, enabled);
 	REQUIRE(r.num_rules_for_ruleset(non_default_ruleset) == 0);
@@ -228,9 +240,10 @@ TEST_CASE("Should enable/disable for overlapping tags", "[rulesets]")
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> filter = create_filter();
 	string rule_name = "one_rule";
+	string source = "syscall";
 	std::set<std::string> want_tags = {"some_tag", "some_different_tag"};
 
-	r.add(rule_name, tags, filter);
+	r.add(source, rule_name, tags, filter);
 
 	r.enable_tags(want_tags, enabled);
 	REQUIRE(r.num_rules_for_ruleset(default_ruleset) == 1);
@@ -241,16 +254,17 @@ TEST_CASE("Should enable/disable for overlapping tags", "[rulesets]")
 
 TEST_CASE("Should enable/disable for incremental adding tags", "[rulesets]")
 {
+	string source = "syscall";
 	falco_ruleset r;
 	std::shared_ptr<gen_event_filter> rule1_filter = create_filter();
 	string rule1_name = "one_rule";
 	std::set<std::string> rule1_tags = {"rule1_tag"};
-	r.add(rule1_name, rule1_tags, rule1_filter);
+	r.add(source, rule1_name, rule1_tags, rule1_filter);
 
 	std::shared_ptr<gen_event_filter> rule2_filter = create_filter();
 	string rule2_name = "two_rule";
 	std::set<std::string> rule2_tags = {"rule2_tag"};
-	r.add(rule2_name, rule2_tags, rule2_filter);
+	r.add(source, rule2_name, rule2_tags, rule2_filter);
 
 	std::set<std::string> want_tags;
 

userspace/engine/CMakeLists.txt

@@ -56,6 +56,3 @@ else()
 endif()
 
 target_link_libraries(falco_engine "${FALCO_SINSP_LIBRARY}" "${LPEG_LIB}" "${LYAML_LIB}" "${LIBYAML_LIB}" luafiles)
-
-configure_file(config_falco_engine.h.in config_falco_engine.h)
-

userspace/engine/config_falco_engine.h.in

@@ -1,20 +0,0 @@
-/*
-Copyright (C) 2019 The Falco Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-#pragma once
-
-#define FALCO_ENGINE_LUA_DIR "${FALCO_ABSOLUTE_SHARE_DIR}/lua/"
-#define FALCO_ENGINE_SOURCE_LUA_DIR "${PROJECT_SOURCE_DIR}/userspace/engine/lua/"

userspace/engine/falco_common.cpp

@@ -16,7 +16,6 @@ limitations under the License.
 
 #include <fstream>
 
-#include "config_falco_engine.h"
 #include "falco_common.h"
 #include "banned.h" // This raises a compilation error when certain functions are used
 #include "falco_engine_lua_files.hh"

userspace/engine/falco_engine.cpp

@@ -25,7 +25,6 @@ limitations under the License.
 #include "falco_engine.h"
 #include "falco_utils.h"
 #include "falco_engine_version.h"
-#include "config_falco_engine.h"
 
 #include "formats.h"
 
@@ -44,7 +43,7 @@ const std::string falco_engine::s_default_ruleset = "falco-default-ruleset";
 
 using namespace std;
 
-falco_engine::falco_engine(bool seed_rng, const std::string& alternate_lua_dir)
+falco_engine::falco_engine(bool seed_rng)
 	: m_next_ruleset_id(0),
 	  m_min_priority(falco_common::PRIORITY_DEBUG),
 	  m_sampling_ratio(1), m_sampling_multiplier(0),
@@ -136,6 +135,12 @@ void falco_engine::list_fields(std::string &source, bool verbose, bool names_onl
 			{
 				for(auto &field : fld_class.fields)
 				{
+					// Skip fields with the EPF_TABLE_ONLY flag.
+					if(field.tags.find("EPF_TABLE_ONLY") != field.tags.end())
+					{
+						continue;
+					}
+
 					printf("%s\n", field.name.c_str());
 				}
 			}
@@ -382,7 +387,7 @@ void falco_engine::describe_rule(string *rule)
 	return m_rules->describe_rule(rule);
 }
 
-// Print statistics on the the rules that triggered
+// Print statistics on the rules that triggered
 void falco_engine::print_stats()
 {
 	lua_getglobal(m_ls, lua_print_stats.c_str());
@@ -415,7 +420,7 @@ void falco_engine::add_filter(std::shared_ptr<gen_event_filter> filter,
 		throw falco_exception(err);
 	}
 
-	it->second->add(rule, tags, filter);
+	it->second->add(source, rule, tags, filter);
 }
 
 bool falco_engine::is_source_valid(const std::string &source)
@@ -427,7 +432,7 @@ bool falco_engine::is_plugin_compatible(const std::string &name,
 					const std::string &version,
 					std::string &required_version)
 {
-	sinsp_plugin::version plugin_version(version.c_str());
+	sinsp_plugin::version plugin_version(version);
 
 	if(!plugin_version.m_valid)
 	{
@@ -442,13 +447,12 @@ bool falco_engine::is_plugin_compatible(const std::string &name,
 
 	for(auto &rversion : m_required_plugin_versions[name])
 	{
-		sinsp_plugin::version req_version(rversion.c_str());
-		if(req_version.m_version_major > plugin_version.m_version_major)
+		sinsp_plugin::version req_version(rversion);
+		if (!plugin_version.check(req_version))
 		{
 			required_version = rversion;
 			return false;
 		}
-
 	}
 
 	return true;

userspace/engine/falco_engine.h

@@ -32,7 +32,6 @@ limitations under the License.
 #include "rules.h"
 #include "ruleset.h"
 
-#include "config_falco_engine.h"
 #include "falco_common.h"
 
 //
@@ -44,7 +43,7 @@ limitations under the License.
 class falco_engine : public falco_common
 {
 public:
-	falco_engine(bool seed_rng=true, const std::string& alternate_lua_dir=FALCO_ENGINE_SOURCE_LUA_DIR);
+	falco_engine(bool seed_rng=true);
 	virtual ~falco_engine();
 
 	// A given engine has a version which identifies the fields

userspace/engine/falco_engine_version.h

@@ -21,5 +21,4 @@ limitations under the License.
 // This is the result of running "falco --list -N | sha256sum" and
 // represents the fields supported by this version of Falco. It's used
 // at build time to detect a changed set of fields.
-#define FALCO_FIELDS_CHECKSUM "afddd456b7304d09d640d15123539bc48db45c5a85794e1e17593a1cf164a34a"
-
+#define FALCO_FIELDS_CHECKSUM "4de812495f8529ac20bda2b9774462b15911a51df293d59fe9ccb6b922fdeb9d"

userspace/engine/json_evt.h

@@ -278,7 +278,7 @@ private:
 	// events. See alias struct for usage.
 	std::list<nlohmann::json::json_pointer> m_jptrs;
 
-	// Theextraction function to use. May not be defined, in which
+	// The extraction function to use. May not be defined, in which
 	// case the default function is used.
 	extract_t m_extract;
 

userspace/engine/lua/CMakeLists.txt

@@ -10,7 +10,7 @@
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 # specific language governing permissions and limitations under the License.
 
-file(GLOB_RECURSE lua_module_files ${CMAKE_CURRENT_SOURCE_DIR} *.lua)
+file(GLOB_RECURSE lua_files ${CMAKE_CURRENT_SOURCE_DIR} *.lua)
 
 add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/falco_engine_lua_files.cpp
 	COMMAND bash ${CMAKE_CURRENT_SOURCE_DIR}/lua-to-cpp.sh ${CMAKE_CURRENT_SOURCE_DIR} ${LYAML_LUA_DIR} ${CMAKE_CURRENT_BINARY_DIR}

userspace/engine/lua/modules/compiler.lua

@@ -40,8 +40,8 @@ end
    The AST is changed in-place.
 
    The return value is a boolean which is true if any macro was
-   substitued. This allows a caller to re-traverse until no more macros are
-   found, a simple strategy for recursive resoltuions (e.g. when a macro
+   substituted. This allows a caller to re-traverse until no more macros are
+   found, a simple strategy for recursive resolutions (e.g. when a macro
    definition uses another macro).
 
 --]]
@@ -113,31 +113,6 @@ function expand_macros(ast, defs, changed)
    return true, changed
 end
 
-function get_macros(ast, set)
-   if (ast.type == "Macro") then
-      set[ast.value] = true
-      return set
-   end
-
-   if ast.type == "Filter" then
-      return get_macros(ast.value, set)
-   end
-
-   if ast.type == "BinaryBoolOp" then
-      local left = get_macros(ast.left, {})
-      local right = get_macros(ast.right, {})
-
-      for m, _ in pairs(left) do set[m] = true end
-      for m, _ in pairs(right) do set[m] = true end
-
-      return set
-   end
-   if ast.type == "UnaryBoolOp" then
-      return get_macros(ast.argument, set)
-   end
-   return set
-end
-
 function get_filters(ast)
 
    local filters = {}

userspace/engine/lua/modules/parser.lua

@@ -57,7 +57,7 @@ local function geterrorinfo()
       end
 end
 
--- creates an errror message using the farthest failure position
+-- creates an error message using the farthest failure position
 local function errormsg()
    return geterrorinfo() / function(t)
          local p = t.ffp or 1

userspace/engine/lua/rule_loader.lua

@@ -59,10 +59,10 @@ end
 
 -- Permissive for case and for common abbreviations.
 priorities = {
-   Emergency=0, Alert=1, Critical=2, Error=3, Warning=4, Notice=5, Informational=5, Debug=7,
-   emergency=0, alert=1, critical=2, error=3, warning=4, notice=5, informational=5, debug=7,
-   EMERGENCY=0, ALERT=1, CRITICAL=2, ERROR=3, WARNING=4, NOTICE=5, INFORMATIONAL=5, DEBUG=7,
-   INFO=5, info=5
+   Emergency=0, Alert=1, Critical=2, Error=3, Warning=4, Notice=5, Informational=6, Debug=7,
+   emergency=0, alert=1, critical=2, error=3, warning=4, notice=5, informational=6, debug=7,
+   EMERGENCY=0, ALERT=1, CRITICAL=2, ERROR=3, WARNING=4, NOTICE=5, INFORMATIONAL=6, DEBUG=7,
+   INFO=6, info=6
 }
 
 --[[
@@ -157,17 +157,6 @@ local function create_filter_obj(node, lua_parser, parent_bool_op)
    return nil
 end
 
-function set_output(output_format, state)
-
-   if(output_ast.type == "OutputFormat") then
-
-      local format
-
-   else
-      error ("Unexpected type in set_output: ".. output_ast.type)
-   end
-end
-
 -- This should be keep in sync with parser.lua
 defined_comp_operators = {
    ["="]=1,
@@ -197,7 +186,7 @@ defined_list_comp_operators = {
 -- object. The by_name index is used for things like describing rules,
 -- and the by_idx index is used to map the relational node index back
 -- to a rule.
-local state = {macros={}, lists={}, filter_ast=nil, rules_by_name={},
+local state = {macros={}, lists={}, rules_by_name={},
 	       skipped_rules_by_name={}, macros_by_name={}, lists_by_name={},
 	       n_rules=0, rules_by_idx={}, ordered_rule_names={}, ordered_macro_names={}, ordered_list_names={}}
 
@@ -620,7 +609,7 @@ function load_rules_doc(rules_mgr, doc, load_state)
 			return false, build_error_with_context(v['context'], "Rule exception item must have name property"), warnings
 		     end
 
-		     -- Seperate case when a exception name is not found
+		     -- Separate case when a exception name is not found
 		     -- This means that a new exception is being appended
 
 		     local new_exception = true
@@ -1059,22 +1048,14 @@ function load_rules(rules_content,
 
 	 else
 	    num_evttypes = falco_rules.add_filter(rules_mgr, lua_parser, v['rule'], v['source'], v['tags'])
-	    if num_evttypes == 0 or num_evttypes > 100 then
+	    if v['source'] == "syscall" and (num_evttypes == 0 or num_evttypes > 100) then
 	       if warn_evttypes == true then
-		  msg = "Rule "..v['rule']..": warning (no-evttype):"
+		  msg = "Rule "..v['rule']..": warning (no-evttype):\n".."         matches too many evt.type values.\n".."         This has a significant performance penalty."
 		  warnings[#warnings + 1] = msg
 	       end
 	    end
 	 end
 
-	 -- Rule ASTs are merged together into one big AST, with "OR" between each
-	 -- rule.
-	 if (state.filter_ast == nil) then
-	    state.filter_ast = filter_ast.filter.value
-	 else
-	    state.filter_ast = { type = "BinaryBoolOp", operator = "or", left = state.filter_ast, right = filter_ast.filter.value }
-	 end
-
 	 -- Enable/disable the rule
 	 if (v['enabled'] == nil) then
 	    v['enabled'] = true

userspace/engine/rules.cpp

@@ -145,11 +145,19 @@ int falco_rules::add_filter(lua_State *ls)
 		lua_pop(ls, 1);
 	}
 
-	size_t num_evttypes = lp->filter()->evttypes().size();
+	// todo(jasondellaluce,leogr,fededp): temp workaround, remove when fixed in libs
+	size_t num_evttypes = 1; // assume plugin
+	if(source == "syscall" || source == "k8s_audit")
+	{
+		num_evttypes = lp->filter()->evttypes().size();
+	}
 
-	try {
+	try
+	{
 		rules->add_filter(lp->filter(), rule, source, tags);
-	} catch (exception &e) {
+	}
+	catch (exception &e)
+	{
 		std::string errstr = string("Could not add rule to falco engine: ") + e.what();
 		lua_pushstring(ls, errstr.c_str());
 		lua_error(ls);

userspace/engine/ruleset.cpp

@@ -66,7 +66,7 @@ void falco_ruleset::ruleset_filters::remove_wrapper_from_list(filter_wrapper_lis
 
 void falco_ruleset::ruleset_filters::add_filter(std::shared_ptr<filter_wrapper> wrap)
 {
-	std::set<uint16_t> fevttypes = wrap->filter->evttypes();
+	std::set<uint16_t> fevttypes = wrap->evttypes();
 
 	if(fevttypes.empty())
 	{
@@ -91,7 +91,7 @@ void falco_ruleset::ruleset_filters::add_filter(std::shared_ptr<filter_wrapper>
 
 void falco_ruleset::ruleset_filters::remove_filter(std::shared_ptr<filter_wrapper> wrap)
 {
-	std::set<uint16_t> fevttypes = wrap->filter->evttypes();
+	std::set<uint16_t> fevttypes = wrap->evttypes();
 
 	if(fevttypes.empty())
 	{
@@ -118,18 +118,16 @@ uint64_t falco_ruleset::ruleset_filters::num_filters()
 
 bool falco_ruleset::ruleset_filters::run(gen_event *evt)
 {
-	if(evt->get_type() >= m_filter_by_event_type.size())
-	{
-		return false;
-	}
-
-	for(auto &wrap : m_filter_by_event_type[evt->get_type()])
-	{
-		if(wrap->filter->run(evt))
-		{
-			return true;
-		}
-	}
+    if(evt->get_type() < m_filter_by_event_type.size())
+    {
+        for(auto &wrap : m_filter_by_event_type[evt->get_type()])
+        {
+            if(wrap->filter->run(evt))
+            {
+                return true;
+            }
+        }
+    }
 
 	// Finally, try filters that are not specific to an event type.
 	for(auto &wrap : m_filter_all_event_types)
@@ -149,16 +147,18 @@ void falco_ruleset::ruleset_filters::evttypes_for_ruleset(std::set<uint16_t> &ev
 
 	for(auto &wrap : m_filters)
 	{
-		auto fevttypes = wrap->filter->evttypes();
+		auto fevttypes = wrap->evttypes();
 		evttypes.insert(fevttypes.begin(), fevttypes.end());
 	}
 }
 
-void falco_ruleset::add(string &name,
+void falco_ruleset::add(string &source,
+			string &name,
 			set<string> &tags,
 			std::shared_ptr<gen_event_filter> filter)
 {
 	std::shared_ptr<filter_wrapper> wrap(new filter_wrapper());
+	wrap->source = source;
 	wrap->name = name;
 	wrap->tags = tags;
 	wrap->filter = filter;

userspace/engine/ruleset.h

@@ -34,7 +34,8 @@ public:
 	falco_ruleset();
 	virtual ~falco_ruleset();
 
-	void add(std::string &name,
+	void add(string &source,
+		 std::string &name,
 		 std::set<std::string> &tags,
 		 std::shared_ptr<gen_event_filter> filter);
 
@@ -73,9 +74,21 @@ private:
 
 	class filter_wrapper {
 	public:
+		std::string source;
 		std::string name;
 		std::set<std::string> tags;
 		std::shared_ptr<gen_event_filter> filter;
+		std::set<uint16_t> evttypes()
+		{
+			// todo(jasondellaluce,leogr): temp workaround, remove when fixed in libs
+			if(source == "syscall" || source == "k8s_audit")
+			{
+				return filter->evttypes();
+			}
+			// else assume plugins
+			return {ppm_event_type::PPME_PLUGINEVENT_E};
+			// workaround end
+		}
 	};
 
 	typedef std::list<std::shared_ptr<filter_wrapper>> filter_wrapper_list;

userspace/falco/CMakeLists.txt

@@ -15,6 +15,8 @@ configure_file(config_falco.h.in config_falco.h)
 
 set(
   FALCO_SOURCES
+  application.cpp
+  app_cmdline_options.cpp
   configuration.cpp
   logger.cpp
   falco_outputs.cpp
@@ -33,6 +35,7 @@ set(
   "${PROJECT_BINARY_DIR}/userspace/falco"
   "${PROJECT_BINARY_DIR}/driver/src"
   "${STRING_VIEW_LITE_INCLUDE}"
+  "${CXXOPTS_INCLUDE_DIR}"
   "${YAMLCPP_INCLUDE_DIR}"
   "${CMAKE_CURRENT_BINARY_DIR}"
   "${DRAIOS_DEPENDENCIES_DIR}/yaml-${DRAIOS_YAML_VERSION}/target/include"
@@ -46,6 +49,7 @@ set(
   luajit
   lpeg
   lyaml
+  cxxopts
 )
 
 set(

userspace/falco/app_cmdline_options.cpp

@@ -0,0 +1,203 @@
+/*
+Copyright (C) 2022 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "app_cmdline_options.h"
+#include "configuration.h"
+#include "config_falco.h"
+
+#include <fstream>
+
+namespace falco {
+namespace app {
+
+// Most bool member variables do not need to be set explicitly, as
+// they are bound to command line options that have default
+// values. However, a few options can be ifdef'd out so explicitly
+// initialize their linked variables.
+cmdline_options::cmdline_options()
+	: event_buffer_format(sinsp_evt::PF_NORMAL),
+	  list_plugins(false),
+	  m_cmdline_opts("falco", "Falco - Cloud Native Runtime Security")
+{
+	define();
+}
+
+cmdline_options::~cmdline_options()
+{
+}
+
+bool cmdline_options::parse(int argc, char **argv, std::string &errstr)
+{
+	try {
+		m_cmdline_parsed = m_cmdline_opts.parse(argc, argv);
+	}
+	catch (std::exception &e)
+	{
+		errstr = e.what();
+		return false;
+	}
+
+	// Some options require additional processing/validation
+	std::ifstream conf_stream;
+	if (!conf_filename.empty())
+	{
+		conf_stream.open(conf_filename);
+		if (!conf_stream.is_open())
+		{
+			errstr = std::string("Could not find configuration file at ") + conf_filename;
+			return false;
+		}
+	}
+	else
+	{
+#ifndef BUILD_TYPE_RELEASE
+		conf_stream.open(FALCO_SOURCE_CONF_FILE);
+		if (conf_stream.is_open())
+		{
+			conf_filename = FALCO_SOURCE_CONF_FILE;
+		}
+		else
+#endif
+		{
+			conf_stream.open(FALCO_INSTALL_CONF_FILE);
+			if (conf_stream.is_open())
+			{
+				conf_filename = FALCO_INSTALL_CONF_FILE;
+			}
+			else
+			{
+				// Note we do not return false here. Although there is
+				// no valid config file, some ways of running falco
+				// (e.g. --help, --list) do not need a config file.
+				//
+				// Later, when it comes time to read a config file, if
+				// the filename is empty we exit with an error.
+				conf_filename = "";
+			}
+		}
+	}
+
+	if(m_cmdline_parsed.count("b") > 0)
+	{
+		event_buffer_format = sinsp_evt::PF_BASE64;
+	}
+
+	// Expand any paths provided via -r and fill in rules_filenames
+	if(m_cmdline_parsed.count("r") > 0)
+	{
+		for(auto &path : m_cmdline_parsed["r"].as<std::vector<std::string>>())
+		{
+			falco_configuration::read_rules_file_directory(path, rules_filenames);
+		}
+	}
+
+	// Convert the vectors of enabled/disabled tags into sets to match falco engine API
+	if(m_cmdline_parsed.count("T") > 0)
+	{
+		for(auto &tag : m_cmdline_parsed["T"].as<std::vector<std::string>>())
+		{
+			disabled_rule_tags.insert(tag);
+		}
+	}
+
+	if(m_cmdline_parsed.count("t") > 0)
+	{
+		for(auto &tag : m_cmdline_parsed["t"].as<std::vector<std::string>>())
+		{
+			enabled_rule_tags.insert(tag);
+		}
+	}
+
+	// Some combinations of arguments are not allowed.
+
+	// You can't both disable and enable rules
+	if((disabled_rule_substrings.size() + disabled_rule_tags.size() > 0) &&
+	   enabled_rule_tags.size() > 0)
+	{
+		errstr = std::string("You can not specify both disabled (-D/-T) and enabled (-t) rules");
+		return false;
+	}
+
+	if (daemon && pidfilename == "") {
+		errstr = std::string("If -d is provided, a pid file must also be provided");
+		return false;
+	}
+
+	list_fields = m_cmdline_parsed.count("list") > 0 ? true : false;
+
+	return true;
+}
+
+std::string cmdline_options::usage()
+{
+	return m_cmdline_opts.help();
+}
+
+void cmdline_options::define()
+{
+	m_cmdline_opts.add_options()
+		("h,help",                        "Print this page", cxxopts::value(help)->default_value("false"))
+#ifdef BUILD_TYPE_RELEASE
+		("c",                             "Configuration file. If not specified uses " FALCO_INSTALL_CONF_FILE ".", cxxopts::value(conf_filename), "<path>")
+#else
+		("c",                             "Configuration file. If not specified tries " FALCO_SOURCE_CONF_FILE ", " FALCO_INSTALL_CONF_FILE ".", cxxopts::value(conf_filename), "<path>")
+#endif
+		("A",                             "Monitor all events, including those with EF_DROP_SIMPLE_CONS flag.", cxxopts::value(all_events)->default_value("false"))
+		("b,print-base64",                "Print data buffers in base64. This is useful for encoding binary data that needs to be used over media designed to consume this format.")
+		("cri",                           "Path to CRI socket for container metadata. Use the specified socket to fetch data from a CRI-compatible runtime. If not specified, uses libs default. It can be passed multiple times to specify socket to be tried until a successful one is found.", cxxopts::value(cri_socket_paths), "<path>")
+		("d,daemon",                      "Run as a daemon.", cxxopts::value(daemon)->default_value("false"))
+		("disable-cri-async",             "Disable asynchronous CRI metadata fetching. This is useful to let the input event wait for the container metadata fetch to finish before moving forward. Async fetching, in some environments leads to empty fields for container metadata when the fetch is not fast enough to be completed asynchronously. This can have a performance penalty on your environment depending on the number of containers and the frequency at which they are created/started/stopped.", cxxopts::value(disable_cri_async)->default_value("false"))
+		("disable-source",                "Disable a specific event source. Available event sources are: syscall, k8s_audit, or any source from a configured source plugin. It can be passed multiple times. Can not disable all event sources.", cxxopts::value(disable_sources), "<event_source>")
+		("D",                             "Disable any rules with names having the substring <substring>. Can be specified multiple times. Can not be specified with -t.", cxxopts::value(disabled_rule_substrings), "<substring>")
+		("e",                             "Read the events from <events_file> (in .scap format for sinsp events, or jsonl for k8s audit events) instead of tapping into live.", cxxopts::value(trace_filename), "<events_file>")
+		("i",                             "Print all events that are ignored by default (i.e. without the -A flag) and exit.", cxxopts::value(print_ignored_events)->default_value("false"))
+#ifndef MINIMAL_BUILD
+		("k,k8s-api",                     "Enable Kubernetes support by connecting to the API server specified as argument. E.g. \"http://admin:password@127.0.0.1:8080\". The API server can also be specified via the environment variable FALCO_K8S_API.", cxxopts::value(k8s_api), "<url>")
+		("K,k8s-api-cert",                "Use the provided files names to authenticate user and (optionally) verify the K8S API server identity. Each entry must specify full (absolute, or relative to the current directory) path to the respective file. Private key password is optional (needed only if key is password protected). CA certificate is optional. For all files, only PEM file format is supported. Specifying CA certificate only is obsoleted - when single entry is provided for this option, it will be interpreted as the name of a file containing bearer token. Note that the format of this command-line option prohibits use of files whose names contain ':' or '#' characters in the file name.", cxxopts::value(k8s_api_cert), "(<bt_file> | <cert_file>:<key_file[#password]>[:<ca_cert_file>])")
+		("k8s-node",                      "The node name will be used as a filter when requesting metadata of pods to the API server. Usually, it should be set to the current node on which Falco is running. If empty, no filter is set, which may have a performance penalty on large clusters.", cxxopts::value(k8s_node_name), "<node_name>")
+#endif
+		("L",                             "Show the name and description of all rules and exit.", cxxopts::value(describe_all_rules)->default_value("false"))
+		("l",                             "Show the name and description of the rule with name <rule> and exit.", cxxopts::value(describe_rule), "<rule>")
+		("list",                          "List all defined fields. If <source> is provided, only list those fields for the source <source>. Current values for <source> are \"syscall\", \"k8s_audit\", or any source from a configured source plugin.", cxxopts::value(list_source_fields)->implicit_value(""), "<source>")
+#ifndef MUSL_OPTIMIZED
+		("list-plugins",                  "Print info on all loaded plugins and exit.", cxxopts::value(list_plugins)->default_value("false"))
+#endif
+#ifndef MINIMAL_BUILD
+		("m,mesos-api",                   "Enable Mesos support by connecting to the API server specified as argument. E.g. \"http://admin:password@127.0.0.1:5050\". Marathon url is optional and defaults to Mesos address, port 8080. The API servers can also be specified via the environment variable FALCO_MESOS_API.", cxxopts::value(mesos_api), "<url[,marathon_url]>")
+#endif
+		("M",                             "Stop collecting after <num_seconds> reached.", cxxopts::value(duration_to_tot)->default_value("0"), "<num_seconds>")
+		("N",                             "When used with --list/--list-source, only print field names.", cxxopts::value(names_only)->default_value("false"))
+		("o,option",                      "Set the value of option <opt> to <val>. Overrides values in configuration file. <opt> can be identified using its location in configuration file using dot notation. Elements which are entries of lists can be accessed via square brackets [].\n    E.g. base.id = val\n         base.subvalue.subvalue2 = val\n         base.list[1]=val", cxxopts::value(cmdline_config_options), "<opt>=<val>")
+		("p,print",                       "Add additional information to each falco notification's output.\nWith -pc or -pcontainer will use a container-friendly format.\nWith -pk or -pkubernetes will use a kubernetes-friendly format.\nWith -pm or -pmesos will use a mesos-friendly format.\nAdditionally, specifying -pc/-pk/-pm will change the interpretation of %container.info in rule output fields.", cxxopts::value(print_additional), "<output_format>")
+		("P,pidfile",                     "When run as a daemon, write pid to specified file", cxxopts::value(pidfilename)->default_value("/var/run/falco.pid"), "<pid_file>")
+		("r",                             "Rules file/directory (defaults to value set in configuration file, or /etc/falco_rules.yaml). Can be specified multiple times to read from multiple files/directories.", cxxopts::value<std::vector<std::string>>(), "<rules_file>")
+		("s",                             "If specified, append statistics related to Falco's reading/processing of events to this file (only useful in live mode).", cxxopts::value(stats_filename), "<stats_file>")
+		("stats-interval",                "When using -s <stats_file>, write statistics every <msec> ms. This uses signals, so don't recommend intervals below 200 ms. Defaults to 5000 (5 seconds).", cxxopts::value(stats_interval)->default_value("5000"),  "<msec>")
+		("S,snaplen",                     "Capture the first <len> bytes of each I/O buffer. By default, the first 80 bytes are captured. Use this option with caution, it can generate huge trace files.", cxxopts::value(snaplen)->default_value("0"), "<len>")
+		("support",                       "Print support information including version, rules files used, etc. and exit.", cxxopts::value(print_support)->default_value("false"))
+		("T",                             "Disable any rules with a tag=<tag>. Can be specified multiple times. Can not be specified with -t", cxxopts::value<std::vector<std::string>>(), "<tag>")
+		("t",                             "Only run those rules with a tag=<tag>. Can be specified multiple times. Can not be specified with -T/-D.", cxxopts::value<std::vector<std::string>>(), "<tag>")
+		("U,unbuffered",                  "Turn off output buffering to configured outputs. This causes every single line emitted by falco to be flushed which generates higher CPU usage but is useful when piping those outputs into another process or into a script.", cxxopts::value(unbuffered_outputs)->default_value("false"))
+		("u,userspace",                   "Parse events from userspace. To be used in conjunction with the ptrace(2) based driver (pdig)", cxxopts::value(userspace)->default_value("false"))
+		("V,validate",                    "Read the contents of the specified rules(s) file and exit. Can be specified multiple times to validate multiple files.", cxxopts::value(validate_rules_filenames), "<rules_file>")
+		("v",                             "Verbose output.", cxxopts::value(verbose)->default_value("false"))
+		("version",                       "Print version number.", cxxopts::value(print_version_info)->default_value("false"));
+
+	m_cmdline_opts.set_width(140);
+}
+
+}; // namespace app
+}; // namespace falco

userspace/falco/app_cmdline_options.h

@@ -0,0 +1,85 @@
+/*
+Copyright (C) 2022 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#pragma once
+
+#include <event.h>
+
+#include <cxxopts.hpp>
+
+#include <string>
+#include <vector>
+#include <set>
+
+namespace falco {
+namespace app {
+
+class cmdline_options {
+public:
+	cmdline_options();
+	~cmdline_options();
+
+	// Each of these maps directly to a command line option.
+	bool help;
+	std::string conf_filename;
+	bool all_events;
+	sinsp_evt::param_fmt event_buffer_format;
+	std::vector<std::string> cri_socket_paths;
+	bool daemon;
+	bool disable_cri_async;
+	std::vector<std::string> disable_sources;
+	std::vector<std::string> disabled_rule_substrings;
+	std::string trace_filename;
+	std::string k8s_api;
+	std::string k8s_api_cert;
+	std::string k8s_node_name;
+	bool describe_all_rules;
+	std::string describe_rule;
+	bool print_ignored_events;
+	bool list_fields;
+	std::string list_source_fields;
+	bool list_plugins;
+	std::string mesos_api;
+	int duration_to_tot;
+	bool names_only;
+	std::vector<std::string> cmdline_config_options;
+	std::string print_additional;
+	std::string pidfilename;
+	std::list<std::string> rules_filenames;
+	std::string stats_filename;
+	uint64_t stats_interval;
+	uint64_t snaplen;
+	bool print_support;
+	std::set<std::string> disabled_rule_tags;
+	std::set<std::string> enabled_rule_tags;
+	bool unbuffered_outputs;
+	bool userspace;
+	std::vector<std::string> validate_rules_filenames;
+	bool verbose;
+	bool print_version_info;
+
+	bool parse(int argc, char **argv, std::string &errstr);
+
+	std::string usage();
+private:
+	void define();
+
+	cxxopts::Options m_cmdline_opts;
+	cxxopts::ParseResult m_cmdline_parsed;
+};
+
+}; // namespace application
+}; // namespace falco

userspace/falco/application.cpp

@@ -0,0 +1,61 @@
+/*
+Copyright (C) 2022 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// The falco "app" holds application-level configuration and contains
+// the implementation of any subcommand-like behaviors like --list, -i
+// (print_ignored_events), etc.
+
+// It also contains the code to initialize components like the
+// inspector, falco engine, etc.
+
+#include "application.h"
+#include "falco_common.h"
+
+namespace falco {
+namespace app {
+
+application::application()
+	: m_initialized(false)
+{
+}
+
+application::~application()
+{
+}
+
+cmdline_options &application::options()
+{
+	if(!m_initialized)
+	{
+		throw falco_exception("App init() not called yet");
+	}
+
+	return m_cmdline_options;
+}
+
+bool application::init(int argc, char **argv, std::string &errstr)
+{
+	if(!m_cmdline_options.parse(argc, argv, errstr))
+	{
+		return false;
+	}
+
+	m_initialized = true;
+	return true;
+}
+
+}; // namespace app
+}; // namespace falco

userspace/falco/application.h

@@ -0,0 +1,53 @@
+/*
+Copyright (C) 2022 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// The falco "app" will eventually replace the monolithic code in
+// falco.cpp. We expect it will be responsible for the following:
+//  - Parsing/validating command line options
+//  - Parsing/validating falco config
+//  - Initialize prerequisites (inspector, falco engine, webserver, etc)
+//  - Loading plugins
+//  - Loading/validating rules
+//  - Command/subcommand execution (e.g. --list/--list-fields, or
+//    nothing specified to run "main" loop)
+
+// For now, it is only responsible for command line options.
+#pragma once
+
+#include "app_cmdline_options.h"
+
+#include <string>
+
+namespace falco {
+namespace app {
+
+class application {
+public:
+
+	application();
+	virtual ~application();
+
+	cmdline_options &options();
+	bool init(int argc, char **argv, std::string &errstr);
+
+private:
+
+	cmdline_options m_cmdline_options;
+	bool m_initialized;
+};
+
+}; // namespace app
+}; // namespace falco

userspace/falco/config_falco.h.in

@@ -30,5 +30,5 @@ limitations under the License.
 #define FALCO_INSTALL_CONF_FILE "/etc/falco/falco.yaml"
 #define FALCO_ENGINE_PLUGINS_DIR "${FALCO_ABSOLUTE_SHARE_DIR}/plugins/"
 
-#define PROBE_NAME "@PROBE_NAME@"
-#define DRIVER_VERSION "@PROBE_VERSION@"
+#define DRIVER_NAME "@DRIVER_NAME@"
+#define DRIVER_VERSION "@DRIVER_VERSION@"

userspace/falco/configuration.cpp

@@ -51,7 +51,7 @@ falco_configuration::~falco_configuration()
 	}
 }
 
-void falco_configuration::init(string conf_filename, list<string> &cmdline_options)
+void falco_configuration::init(string conf_filename, const vector<string> &cmdline_options)
 {
 	string m_config_file = conf_filename;
 	m_config = new yaml_configuration();
@@ -148,6 +148,10 @@ void falco_configuration::init(string conf_filename, list<string> &cmdline_optio
 		}
 		http_output.options["url"] = url;
 
+		string user_agent;
+		user_agent = m_config->get_scalar<string>("http_output.user_agent","falcosecurity/falco");
+		http_output.options["user_agent"] = user_agent;
+
 		m_outputs.push_back(http_output);
 	}
 
@@ -386,7 +390,7 @@ static bool split(const string &str, char delim, pair<string, string> &parts)
 	return true;
 }
 
-void falco_configuration::init_cmdline_options(list<string> &cmdline_options)
+void falco_configuration::init_cmdline_options(const vector<string> &cmdline_options)
 {
 	for(const string &option : cmdline_options)
 	{

userspace/falco/configuration.h

@@ -216,8 +216,8 @@ public:
 	falco_configuration();
 	virtual ~falco_configuration();
 
-	void init(std::string conf_filename, std::list<std::string>& cmdline_options);
-	void init(std::list<std::string>& cmdline_options);
+	void init(std::string conf_filename, const std::vector<std::string>& cmdline_options);
+	void init(const std::vector<std::string>& cmdline_options);
 
 	static void read_rules_file_directory(const string& path, list<string>& rules_filenames);
 
@@ -266,7 +266,7 @@ public:
 	std::vector<plugin_config> m_plugins;
 
 private:
-	void init_cmdline_options(std::list<std::string>& cmdline_options);
+	void init_cmdline_options(const std::vector<std::string>& cmdline_options);
 
 	/**
 	 * Given a <key>=<value> specifier, set the appropriate option
@@ -288,12 +288,12 @@ namespace YAML {
 			double double_val;
 			bool bool_val;
 			std::string str_val;
-			nlohmann::json sub{};
 
 			switch (node.Type()) {
 				case YAML::NodeType::Map:
 					for (auto &&it: node)
 					{
+						nlohmann::json sub{};
 						YAML::convert<nlohmann::json>::decode(it.second, sub);
 						res[it.first.as<std::string>()] = sub;
 					}
@@ -301,6 +301,7 @@ namespace YAML {
 				case YAML::NodeType::Sequence:
 					for (auto &&it : node)
 					{
+						nlohmann::json sub{};
 						YAML::convert<nlohmann::json>::decode(it, sub);
 						res.emplace_back(sub);
 					}

userspace/falco/event_drops.cpp

@@ -73,6 +73,7 @@ bool syscall_evt_drop_mgr::process_event(sinsp *inspector, sinsp_evt *evt)
 		delta.n_evts = stats.n_evts - m_last_stats.n_evts;
 		delta.n_drops = stats.n_drops - m_last_stats.n_drops;
 		delta.n_drops_buffer = stats.n_drops_buffer - m_last_stats.n_drops_buffer;
+		delta.n_drops_scratch_map = stats.n_drops_scratch_map - m_last_stats.n_drops_scratch_map;
 		delta.n_drops_pf = stats.n_drops_pf - m_last_stats.n_drops_pf;
 		delta.n_drops_bug = stats.n_drops_bug - m_last_stats.n_drops_bug;
 		delta.n_preemptions = stats.n_preemptions - m_last_stats.n_preemptions;
@@ -148,6 +149,7 @@ bool syscall_evt_drop_mgr::perform_actions(uint64_t now, scap_stats &delta, bool
 			output_fields["n_evts"] = std::to_string(delta.n_evts);
 			output_fields["n_drops"] = std::to_string(delta.n_drops);
 			output_fields["n_drops_buffer"] = std::to_string(delta.n_drops_buffer);
+			output_fields["n_drops_scratch_map"] = std::to_string(delta.n_drops_scratch_map);
 			output_fields["n_drops_pf"] = std::to_string(delta.n_drops_pf);
 			output_fields["n_drops_bug"] = std::to_string(delta.n_drops_bug);
 			output_fields["ebpf_enabled"] = std::to_string(bpf_enabled);

userspace/falco/grpc_server.cpp

@@ -119,7 +119,7 @@ void falco::grpc::server::thread_process(int thread_index)
 			ctx->end(this, false);
 			break;
 		default:
-			// todo(leodido) > log error "unkown completion queue event: tag=tag, state=ctx->m_state"
+			// todo(leodido) > log error "unknown completion queue event: tag=tag, state=ctx->m_state"
 			break;
 		}
 

userspace/falco/logger.cpp

@@ -120,7 +120,7 @@ void falco_logger::log(int priority, const string msg)
 			if(atime)
 			{
 				tstr = atime;
-				tstr = tstr.substr(0, 24);// remove trailling newline
+				tstr = tstr.substr(0, 24);// remove trailing newline
 			}
 			else
 			{

userspace/falco/outputs_http.cpp

@@ -34,11 +34,14 @@ void falco::outputs::output_http::output(const message *msg)
 		} else {
 			slist1 = curl_slist_append(slist1, "Content-Type: text/plain");
 		}
+
 		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist1);
 		curl_easy_setopt(curl, CURLOPT_URL, m_oc.options["url"].c_str());
 		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, msg->msg.c_str());
+		curl_easy_setopt(curl, CURLOPT_USERAGENT, m_oc.options["user_agent"].c_str());
 		curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, -1L);
 
+
 		res = curl_easy_perform(curl);
 
 		if(res != CURLE_OK)
@@ -50,4 +53,4 @@ void falco::outputs::output_http::output(const message *msg)
 		curl_slist_free_all(slist1);
 		slist1 = NULL;
 	}
-}
+}

userspace/falco/verify_engine_fields.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 
 SOURCE_DIR=$1
 
-NEW_CHECKSUM=$(./falco --list -N | sha256sum | awk '{print $1}')
+NEW_CHECKSUM=$(./falco -c ${SOURCE_DIR}/falco.yaml --list -N | sha256sum | awk '{print $1}')
 CUR_CHECKSUM=$(grep FALCO_FIELDS_CHECKSUM "${SOURCE_DIR}/userspace/engine/falco_engine_version.h" | awk '{print $3}' | sed -e 's/"//g')
 
 if [ "$NEW_CHECKSUM" != "$CUR_CHECKSUM" ]; then

userspace/falco/webserver.cpp

@@ -93,7 +93,7 @@ bool k8s_audit_handler::accept_data(falco_engine *engine,
 		}
 		catch(...)
 		{
-			errstr = string("unkown error processing audit event");
+			errstr = string("unknown error processing audit event");
 			fprintf(stderr, "%s\n", errstr.c_str());
 			return false;
 		}
@@ -130,7 +130,7 @@ bool k8s_audit_handler::handleGet(CivetServer *server, struct mg_connection *con
 	return true;
 }
 
-// The version in CivetServer.cpp has valgrind compliants due to
+// The version in CivetServer.cpp has valgrind complaints due to
 // unguarded initialization of c++ string from buffer.
 static void get_post_data(struct mg_connection *conn, std::string &postdata)
 {