PwnKit Local Privilege Escalation

Description

Detects potential PwnKit exploitation CVE-2021-4034 in auth logs

Query · sigma

keywords:
  '|all':
  - pkexec
  - The value for environment variable XAUTHORITY contains suspicious content
  - '[USER=root] [TTY=/dev/pts/0]'
condition: keywords

Known false positives

  • Unknown
Raw source PwnKit Local Privilege Escalation · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: PwnKit Local Privilege Escalation
id: 0506a799-698b-43b4-85a1-ac4c84c720e9
status: test
description: Detects potential PwnKit exploitation CVE-2021-4034 in auth logs
references:
    - https://twitter.com/wdormann/status/1486161836961579020
author: Sreeman
date: 2022-01-26
modified: 2024-09-11
tags:
    - attack.privilege-escalation
    - attack.t1548.001
    - detection.emerging-threats
    - cve.2021-4034
logsource:
    product: linux
    service: auth
detection:
    keywords:
        '|all':
            - 'pkexec'
            - 'The value for environment variable XAUTHORITY contains suspicious content'
            - '[USER=root] [TTY=/dev/pts/0]'
    condition: keywords
falsepositives:
    - Unknown
level: high

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