Junglewise Threat Intelligence

CVE-2024-38193: Microsoft Windows Ancillary Function Driver for WinSock Privilege Escalation Vulnerability

CVE-2024-38193 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2024-08-13

Technologies: Microsoft Windows Server 2008, Microsoft Windows, Microsoft Windows Server 2019, Microsoft Windows 11, Microsoft Windows Server 2016, Microsoft Windows Server 2012, Microsoft Windows Server 2022, Microsoft Windows 10. Vendors: Microsoft.

Executive brief

The Microsoft Windows Ancillary Function Driver (AFD) for WinSock contains a use-after-free vulnerability that allows a local attacker to escalate privileges to SYSTEM. The flaw is actively exploited in the wild and affects a wide range of Windows client and server operating systems.

Affected products

  • Microsoft Windows 10 1507, 1607, 1809, 21H2, 22H2
  • Microsoft Windows 11 21H2, 22H2, 23H2, 24H2
  • Microsoft Windows Server 2008 SP2, R2 SP1
  • Microsoft Windows Server 2012 Gold, R2
  • Microsoft Windows Server 2016 All versions
  • Microsoft Windows Server 2019 All versions
  • Microsoft Windows Server 2022 All versions, 23H2

Timeline

  • 2024-08-13: disclosed
  • 2024-08-13: patched: Microsoft released security updates to address the vulnerability.
  • 2024-08-13: kev added: CISA added this vulnerability to the Known Exploited Vulnerabilities (KEV) catalog.
  • 2024-08-13: exploited: Reported as exploited in the wild at the time of disclosure.

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