Potential Privilege Escalation via PKEXEC
editPotential Privilege Escalation via PKEXEC
editIdentifies an attempt to exploit a local privilege escalation in polkit pkexec (CVE-2021-4034) via an insecure environment variable injection. Successful exploitation allows an unprivileged user to escalate to the root user.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Linux
- Threat Detection
- Privilege Escalation
Version: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editfile where file.path : "/*GCONV_PATH*"
Framework: MITRE ATT&CKTM
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Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
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Technique:
- Name: Exploitation for Privilege Escalation
- ID: T1068
- Reference URL: https://attack.mitre.org/techniques/T1068/
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Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
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Technique:
- Name: Hijack Execution Flow
- ID: T1574
- Reference URL: https://attack.mitre.org/techniques/T1574/
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Sub-technique:
- Name: Path Interception by PATH Environment Variable
- ID: T1574.007
- Reference URL: https://attack.mitre.org/techniques/T1574/007/