Check Point Advisories

Microsoft Windows Ancillary Function Driver for WinSock Elevation of Privilege (CVE-2023-21768)

Vulnerability
Protection

Check Point Reference:	CPAI-2023-0005
Date Published:	10 Jan 2023
Severity:	High
Last Updated:	Monday 11 December, 2023
Source:	Microsoft CVE-2023-21768
Industry Reference:	CVE-2023-21768
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows Server 2022 Windows Server 2022 (Server Core installation) Windows Server 2022 Datacenter: Azure Edition 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
Vulnerability Description	An elevation of privilege vulnerability exists in Microsoft Windows. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Microsoft Windows Ancillary Function Driver for WinSock Elevation of Privilege (CVE-2023-21768) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Content Protection Violation.
Attack Information: Microsoft Windows Ancillary Function Driver for WinSock Elevation of Privilege (CVE-2023-21768)