Check Point Advisories

Microsoft Skype for Business Server-Side Request Forgery (CVE-2023-41763)

Check Point Reference: CPAI-2023-1131
Date Published: 21 Nov 2023
Severity: Medium
Last Updated: Monday 24 March, 2025
Source:
Industry Reference:CVE-2023-41763
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Microsoft Skype for Business server 2015 cumulative update 13
Microsoft Skype for Business server 2019 cumulative update 7
Vulnerability Description A server-side request forgery vulnerability exists in Microsoft Skype for Business. Successful exploitation of this vulnerability could allow an unauthenticated attacker to make a request to any internal and external server.

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 Skype for Business Server-Side Request Forgery (CVE-2023-41763) 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 Skype for Business Server-Side Request Forgery (CVE-2023-41763)

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