Check Point Advisories

Microsoft Windows Denial of Service (CVE-2023-21547)

Vulnerability
Protection

Check Point Reference:	CPAI-2023-0346
Date Published:	8 Jun 2023
Severity:	High
Last Updated:	Monday 19 June, 2023
Source:
Industry Reference:	CVE-2023-21547
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Windows 10 1607 on X64 Microsoft Windows 10 1607 on X86 Microsoft Windows 10 1809 on x86 Microsoft Windows 10 1809 on x86 Microsoft Windows 10 1809 on x86 Microsoft Windows 10 21h2 on ARM64 Microsoft Windows 10 21h2 on X64 Microsoft Windows 10 21h2 on X86 Microsoft Windows 10 22h2 on ARM64 Microsoft Windows 10 22h2 on X64 Microsoft Windows 10 22h2 on X86 Microsoft Windows 11 21H2 on ARM64 Microsoft Windows 11 21H2 on x64 Microsoft Windows 11 22H2 on ARM64 Microsoft Windows 11 22H2 on x64 Microsoft Windows Server 2016 Standard Edition on X86 Microsoft Windows Server 2019 Standard Edition on x86 Microsoft Windows Server 2022 - - Edition
Vulnerability Description	A denial-of-service vulnerability exists in Microsoft Windows. Successful exploitation of this vulnerability would allow a remote attacker to create a denial of service condition 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 Denial of Service (CVE-2023-21547) 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 Denial of Service (CVE-2023-21547)