Check Point Advisories

Microsoft Exchange Server Insecure Deserialization (CVE-2023-36035)

Vulnerability
Protection

Check Point Reference:	CPAI-2023-1519
Date Published:	12 Feb 2024
Severity:	High
Last Updated:	Monday 12 February, 2024
Source:
Industry Reference:	CVE-2023-36035
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Exchange Server 2016 Cumulative Update 23 Microsoft Exchange Server 2019 Cumulative Update 12 Microsoft Exchange Server 2019 Cumulative Update 13
Vulnerability Description	An insecure deserialization vulnerability exists in Microsoft Exchange Server. Successful exploitation of this vulnerability could result in information disclosure and spoofing.

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 Insecure Deserialization (CVE-2023-36035) 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 Insecure Deserialization (CVE-2023-36035)