Check Point Advisories

Microsoft Windows Win32k.sys Malformed IFrame Memory Corruption (MS12-008; CVE-2011-5046)

Check Point Reference: CPAI-2012-013
Date Published: 4 Jan 2012
Severity: Critical
Last Updated: Tuesday 14 February, 2012
Source:
Industry Reference:CVE-2011-5046
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description A memory corruption vulnerability has been reported in Microsoft Windows. The vulnerability is due to an error in win32k.sys while opening web pages containing a specially crafted I frame tag with Apple Safari browser. A remote attacker may exploit this issue by enticing Apple Safari users to open a web page containing an IFrame with an overly large "height" attribute. Successful exploitation may allow an attacker to execute arbitrary code on the target system with kernel-mode privileges.

Protection Overview

This protection will detect and block attempts to open specially crafted web pages.

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 / R71 / R70

  1. In the IPS tab, click Protections and find the Microsoft Windows Win32k.sys Malformed IFrame Memory Corruption (MS12-008) 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:  Web Client Enforcement Violation.
Attack Information:  Microsoft Windows Win32k.sys malformed IFrame memory corruption (MS12-008)

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