PwnKit Local Privilege Escalation

calendar Apr 28, 2026 · attack.privilege-escalation attack.t1548.001 detection.emerging-threats cve.2021-4034  ·
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Detects potential PwnKit exploitation CVE-2021-4034 in auth logs

Sigma rule (View on GitHub)

 1title: PwnKit Local Privilege Escalation
 2id: 0506a799-698b-43b4-85a1-ac4c84c720e9
 3status: test
 4description: Detects potential PwnKit exploitation CVE-2021-4034 in auth logs
 5references:
 6    - https://twitter.com/wdormann/status/1486161836961579020
 7author: Sreeman
 8date: 2022-01-26
 9modified: 2024-09-11
10tags:
11    - attack.privilege-escalation
12    - attack.t1548.001
13    - detection.emerging-threats
14    - cve.2021-4034
15logsource:
16    product: linux
17    service: auth
18detection:
19    keywords:
20        '|all':
21            - 'pkexec'
22            - 'The value for environment variable XAUTHORITY contains suspicious content'
23            - '[USER=root] [TTY=/dev/pts/0]'
24    condition: keywords
25falsepositives:
26    - Unknown
27level: high

References

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