Check Point Advisories

Microsoft Exchange Server Spoofing (CVE-2023-36039)

Check Point Reference: CPAI-2023-1507
Date Published: 4 Feb 2024
Severity: High
Last Updated: Sunday 04 February, 2024
Industry Reference:CVE-2023-36039
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 A spoofing vulnerability exists in Microsoft Exchange Server. Successful exploitation of this vulnerability would allow a remote attacker to impersonate and present itself as a legitimate host.

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 Exchange Server Spoofing (CVE-2023-36039) 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:  Windows SMB Protection Violation.
Attack Information:  Microsoft Exchange Server Spoofing (CVE-2023-36039)

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