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New Rule Detect Linux Cgroup Container Escape Vulnerability (CVE-2022-0492) #1969

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merged 4 commits into from
May 12, 2022
Merged

New Rule Detect Linux Cgroup Container Escape Vulnerability (CVE-2022-0492) #1969

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c6a0022
Added new rule for CVE-2022-4092
darryk10 Apr 13, 2022
bca7b1d
Fixed CVE number
darryk10 Apr 13, 2022
6db5510
Changed Rule focus to be broader then just a specific CVE
darryk10 Apr 15, 2022
91ac709
Changed field in thread.cap_effective
darryk10 Apr 15, 2022
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10 changes: 10 additions & 0 deletions rules/falco_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -3165,6 +3165,16 @@
priority: CRITICAL
tags: [process, mitre_privilege_escalation]


- rule: Detect release_agent File Container Escapes
desc: "This rule detect an attempt to exploit a container escape using release_agent file. By running a container with certains capabilities, a privileged user can modify release_agent file and escape from the container"
condition:
open_write and container and fd.name endswith release_agent and (user.uid=0 or thread.cap_effective contains CAP_DAC_OVERRIDE) and thread.cap_effective contains CAP_SYS_ADMIN
output:
"Detect an attempt to exploit a container escape using release_agent file (user=%user.name user_loginuid=%user.loginuid filename=%fd.name %container.info image=%container.image.repository:%container.image.tag cap_effective=%thread.cap_effective)"
priority: CRITICAL
tags: [container, mitre_privilege_escalation, mitre_lateral_movement]

# Application rules have moved to application_rules.yaml. Please look
# there if you want to enable them by adding to
# falco_rules.local.yaml.