Possible Sudo Heap Overflow Exploitation via sudoedit (CVE-2021-3156)

ATT&CK techniques

Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1068Exploitation for Privilege Escalation
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects sudoedit invoked in shell or edit mode together with a trailing backslash argument characteristic of the Baron Samedit heap overflow. CVE-2021-3156 is triggered by running sudoedit with the -s or -i flag and an argument ending in an unescaped backslash to overflow the heap and gain root. This command shape is a reliable signature of local privilege escalation attempts against vulnerable sudo.

Reporting behind it

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Possible Sudo Heap Overflow Exploitation via sudoedit (CVE-2021-3156)

Pivot detection · T1068 · 9 related

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