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


Check Point Reference: CPAI-2013-3689
Date Published:
Source: Microsoft Security Bulletin MS13-095
Industry Reference(s): CVE-2013-3869
Protection Provided by: Security Gateway
  • R75
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 Available
Apply patches from: MS13-095
Vulnerability Details
The 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.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  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.

How Do I Know if My Network is Under Attack?
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)