MSRC-CVE-2023-21768 — Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.

Details

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Security updates
10.0.20348.1487 — https://support.microsoft.com/help/5022291
10.0.22000.1455 — https://support.microsoft.com/help/5022287
10.0.22621.1105 — https://support.microsoft.com/help/5022303

Vulnerabilities 1

High 7.8

CVE-2023-21768 Public exploit EPSS 65%

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Microsoft Windows Server 2022 Windows 11 version 22H2 Windows 11 version 21H2 Windows

Jan 10, 2023

Revision history

2023-01-10 #1
Information published.

References

CVE-2023-21768 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21768
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss