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

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

More Likely

Patch Tuesday

2023-Jan

Released

2023-01-10

EPSS Score

74.42% (percentile: 98.9%)

FAQ

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

Detection & Weaponization (2 sources)

Maturity: Exploit

• Metasploit modules: Ancillary Function Driver (AFD) for WinSock Elevation of Privilege
• GitHub PoC: 14 repositories

Affected Products (6)

Windows

• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows 11 version 21H2 for x64-based Systems
• Windows 11 version 21H2 for ARM64-based Systems
• Windows 11 Version 22H2 for ARM64-based Systems
• Windows 11 Version 22H2 for x64-based Systems

Security Updates (3)

• 5022291
• 5022287
• 5022303

Revision History

• 2023-01-10: Information published.