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Microsoft Kerberos NULL Dereference Denial of Service (MS12-069; CVE-2012-2551)


Check Point Reference: CPAI-2012-642
Date Published:
Source: Microsoft Security Bulletin MS12-069
Industry Reference(s): CVE-2012-2551
Protection Provided by: Security Gateway
  • R70
  • R71
  • R75
Who is Vulnerable?
Windows 7 for 32-bit Systems
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based Systems
Vulnerability Description
A denial of service vulnerability has been reported in Microsoft Kerberos.
Update/Patch Available
Apply patches from: MS12-069
Vulnerability Details
The vulnerability is caused when Microsoft Kerberos fails to handle a specially crafted session. A remote attacker can exploit this issue by sending a specially crafted session request to the affected server. Successful exploitation would cause the server to crash, resulting in a denial of service condition.

Protection Overview
This protection will detect and block 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, 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 Kerberos NULL Dereference Denial of Service (MS12-069) 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: Windows SMB Protection Violation
Attack Information: Microsoft Kerberos NULL Dereference Denial of Service (MS12-069)