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Check Point Advisories

Microsoft Windows X.509 Certificate Validation Denial of Service (MS13-095; CVE-2013-3869)

Check Point Reference: CPAI-2013-3689
Date Published: 22 Dec 2013
Severity: High
Last Updated:
Source: CVE-2013-3869
Protection Provided by:

Security Gateway

Who is Vulnerable? Microsoft Windows XP
Microsoft Windows Vista
Microsoft Windows 7
Microsoft Windows 8
Microsoft Windows 8.1
Microsoft Windows RT
Microsoft Windows RT 8.1
Microsoft Windows Server 2003
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2
Vulnerability Description A denial of service vulnerability exists in Microsoft Windows.
Update/Patch AvaliableApply patches from: MS13-095
Vulnerability DetailsThe flaw is due to improper handling of specially crafted X.509 certificates during certificate validation. Successful exploitation could cause a denial of service condition where the web service becomes unresponsive. A remote attacker can exploit this vulnerability by sending a maliciously crafted PKCS#12 file to a vulnerable server.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

  1. In the IPS tab, click Protections and find the Microsoft Windows X.509 Certificate Validation Denial of Service (MS13-095) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: Web Client Enforcement Violation
Attack Information: Microsoft Windows X.509 Certificate Validation Denial of Service (MS13-095)