github/falco
1
0
Fork 0
mirror of https://github.com/falcosecurity/falco.git synced 2025-09-04 16:20:18 +00:00
Code Issues Projects Releases Wiki Activity

Also allow json arrays of k8s audit evts

Browse Source 
Currently, the json object POSTed to the /k8s_audit endpoint is assumed
to be an obect, with a "type" of either "Event" or "EventList". When the
K8s API Server POSTs events, it aggregates them into an EventList,
ensuring that there is always a single object.

However, we're going to add some intermediate tools that tail log files
and send them to the endpoint, and the easiest way to send a batch of
events is to pass them as a json array instead of a single object.

To properly handle this, modify parse_k8s_audit_event_json to also
handle a json array. For arrays, it iterates over the objects, calling
parse_k8s_audit_json recursively. This only iterates an initial top
level array to avoid excessive recursion/attacks involving degenerate
json objects with excessively nested arrays.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>
This commit is contained in:
Mark Stemm
2019-12-09 21:12:00 -08:00
committed by Mark Stemm
parent cd94d05cd9
commit 4c576f31f2
2 changed files with 25 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
userspace/engine/falco_engine.h
View File

@@ -163,7 +163,7 @@ public:
// Returns true if the json object was recognized as a k8s
// audit event(s), false otherwise.
//
bool parse_k8s_audit_json(nlohmann::json &j, std::list<json_event> &evts);
bool parse_k8s_audit_json(nlohmann::json &j, std::list<json_event> &evts, bool top=true);
//
// Given an event, check it against the set of rules in the