Check Point Advisories

Microsoft Exchange Server Remote Code Execution (CVE-2022-23277; CVE-2021-42321)

Vulnerability
Protection

Check Point Reference:	CPAI-2022-0755
Date Published:	6 Nov 2022
Severity:	High
Last Updated:	Thursday 13 February, 2025
Source:
Industry Reference:	CVE-2021-42321 CVE-2022-23277
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Exchange Server 2019 Cumulative Update 11 Microsoft Exchange Server 2016 Cumulative Update 22 Microsoft Exchange Server 2016 Cumulative Update 21 Microsoft Exchange Server 2019 Cumulative Update 10 Microsoft Exchange Server 2013 Cumulative Update 23
Vulnerability Description	A remote code execution vulnerability exists in Microsoft Exchange Server. 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 Exchange Server Remote Code Execution (CVE-2022-23277) 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: Windows SMB Protection Violation.
Attack Information: Microsoft Exchange Server Remote Code Execution (CVE-2022-23277)