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Check Point Advisories

Microsoft Exchange Server Cross Site Scripting (CVE-2021-41349)

Check Point Reference: CPAI-2021-0944
Date Published: 4 Jan 2022
Severity: Medium
Last Updated: Tuesday 04 January, 2022
Source:
Industry Reference:CVE-2021-41349
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2016 Cumulative Update 21
Microsoft Exchange Server 2016 Cumulative Update 22
Microsoft Exchange Server 2019 Cumulative Update 10
Microsoft Exchange Server 2019 Cumulative Update 11
Vulnerability Description A cross site scripting vulnerability exists in Microsoft Exchange Server. Successful exploitation of this vulnerability would allow remote attackers to inject an arbitrary web script into 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 R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Microsoft Exchange Server Cross Site Scripting (CVE-2021-41349) 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 Cross Site Scripting (CVE-2021-41349)

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