Check Point Advisories

Microsoft Windows Kernel Information Disclosure (CVE-2021-31955)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0316
Date Published:	8 Jun 2021
Severity:	High
Last Updated:	Tuesday 08 June, 2021
Source:	Microsoft CVE-2021-31955
Industry Reference:	CVE-2021-31955
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows 10 Version 1809 for 32-bit Systems Windows 10 Version 1809 for x64-based Systems Windows 10 Version 1809 for ARM64-based Systems Windows Server 2019 Windows Server 2019 (Server Core installation) Windows 10 Version 1909 for 32-bit Systems Windows 10 Version 1909 for x64-based Systems Windows 10 Version 1909 for ARM64-based Systems Windows 10 Version 21H1 for x64-based Systems Windows 10 Version 21H1 for ARM64-based Systems Windows 10 Version 21H1 for 32-bit Systems Windows 10 Version 2004 for 32-bit Systems Windows 10 Version 2004 for ARM64-based Systems Windows 10 Version 2004 for x64-based Systems Windows Server, version 2004 (Server Core installation) Windows 10 Version 20H2 for x64-based Systems Windows 10 Version 20H2 for 32-bit Systems Windows 10 Version 20H2 for ARM64-based Systems Windows Server, version 20H2 (Server Core Installation)
Vulnerability Description	An information disclosure vulnerability exists in Microsoft Windows. Successful exploitation of this vulnerability would allow a remote attacker to obtain sensitive information.

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 Kernel Information Disclosure (CVE-2021-31955) 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 Kernel Information Disclosure (CVE-2021-31955)