Check Point Advisories

Internet Explorer Memory Corruption (CVE-2021-26411)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1548
Date Published:	9 Jan 2023
Severity:	High
Last Updated:	Monday 09 January, 2023
Source:
Industry Reference:	CVE-2021-26411
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems Internet Explorer 11 on Windows Server 2019 Internet Explorer 11 on Windows 10 Version 1909 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1909 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1909 for ARM64-based Systems Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems Internet Explorer 11 on Windows 10 Version 2004 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 2004 for ARM64-based Systems Internet Explorer 11 on Windows 10 Version 2004 for x64-based Systems Internet Explorer 11 on Windows 10 Version 20H2 for x64-based Systems Internet Explorer 11 on Windows 10 Version 20H2 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 20H2 for ARM64-based Systems Internet Explorer 11 on Windows 10 for 32-bit Systems Internet Explorer 11 on Windows 10 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 Internet Explorer 11 on Windows 8.1 for 32-bit systems Internet Explorer 11 on Windows 8.1 for x64-based systems Internet Explorer 11 on Windows RT 8.1 Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 Internet Explorer 11 on Windows Server 2012 Internet Explorer 11 on Windows Server 2012 R2 Microsoft Edge on Windows 10 Version 1803 for 32-bit Systems Microsoft Edge on Windows 10 Version 1809 Microsoft Edge on Windows Server 2019 Microsoft Edge on Windows 10 Version 1909 Microsoft Edge on Windows 10 Version 1903 Microsoft Edge on Windows 10 Version 2004 Microsoft Edge on Windows 10 Version 20H2 Microsoft Edge on Windows 10 for 32-bit Systems Microsoft Edge on Windows 10 for x64-based Systems Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems Microsoft Edge on Windows 10 Version 1607 for x64-based Systems Microsoft Edge on Windows Server 2016
Vulnerability Description	A memory corruption vulnerability exists in Microsoft Internet Explorer. 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 Internet Explorer Memory Corruption 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: Internet Explorer Memory Corruption