huntrule

Linux sudo CVE-2019-14287 exploit attempt via unusual USER strings

Alerts on sudo events with USER values matching patterns linked to CVE-2019-14287 exploit attempts.

FreeReviewedSigma · Critical · v5
Product
linux
Service
sudo
Author
Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2019-10-15
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Priv Esc → Defense Evasion

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags sudo activity where the executing USER field matches patterns associated with CVE-2019-14287 exploitation attempts. Attackers may abuse sudo to achieve privilege escalation, and these crafted identifiers are used to trigger vulnerable behavior. It relies on Linux sudo telemetry that includes a USER value for the attempted command execution.

Reporting behind it

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Malicious Looney Tunables Privilege Escalation Exploit by Kinsing (via process_creation)
Malicious Kerberos proxiable/S4U2self Ticket - CVE-2021-42278/42287 (via security)
Malicious Vulnerable Driver HwRwDrv Loaded for BYOVD
Linux sudo CVE-2019-14287 exploit attempt via unusual USER strings
Pivot detection · T1068 · 9 related

Changelog

v5
  1. v5
    Candidate ingested via manual entry.2026-07-31
  2. v4
    Candidate ingested via manual entry.2026-07-31
  3. v3
    Candidate ingested via manual entry.2026-07-31
  4. v2
    Candidate ingested via manual entry.2026-07-31
  5. v1
    No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.