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rule update(Sudo Potential Privilege Escalation): trigger the most common CVE-2021-3156 exploit

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Signed-off-by: Shay Berkovich <sberkovich@blackberry.com>
Co-authored-by: Meera Balsara <mbalsara@blackberry.com>
This commit is contained in:
Shay Berkovich 2021-10-13 11:28:55 +03:00 committed by poiana
parent fdcd7bffd0
commit 6b9fafb75f
1 changed files with 1 additions and 1 deletions
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rules/falco_rules.yaml
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@ -3039,7 +3039,7 @@
# 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]