Check Point Advisories

Microsoft Scripting Engine Memory Corruption (CVE-2021-31959)

Check Point Reference: CPAI-2021-0382
Date Published: 9 Jun 2021
Severity: Critical
Last Updated: Wednesday 09 June, 2021
Source: Microsoft CVE-2021-31959
Industry Reference:CVE-2021-31959
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? 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 20H2 for ARM64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows Server 2019
Windows 8.1 for x64-based systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 2004 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 for 32-bit Systems
Windows Server 2016
Windows Server 2012 R2
Windows Server 2012
Windows 8.1 for 32-bit systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 7 for x64-based Systems Service Pack 1
Windows 10 for x64-based Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows RT 8.1
Vulnerability Description A memory corruption 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

  1. In the IPS tab, click Protections and find the Microsoft Scripting Engine Memory Corruption (CVE-2021-31959) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Content Protection Violation.
Attack Information:  Microsoft Scripting Engine Memory Corruption (CVE-2021-31959)

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