Microsoft Windows TrueType code execution

Notification Type: IBM Security Protection Alert
Notification Date: May 08, 2012
Notification Version: 1.0
Name: Microsoft Windows TrueType code execution
Public disclosure/
In the wild date:
May 08, 2012
Aliases: MS12-034
CVE: CVE-2012-0159

A vulnerability exists in code responsible for parsing TrueType fonts in Microsoft Windows' win32k.sys kernel module.


ISS Coverage

Product Content Version
Proventia Network IDS
Proventia Network IPS
Proventia Network MFS
Proventia Server (Linux)
RealSecure Network
RealSecure Server Sensor
Proventia Desktop
Proventia Server IPS (Windows)
Propagation Techniques ISS Protection Available

remote exploit

 8 May 2012

* This signature is blocked in the default policy.


Detailed Description

Business Impact:

This vulnerability could allow remote code execution if a user opens a specially crafted document or visits a malicious webpage that embeds TrueType font files.

*CVSS Base Score: 9.3
  Access Vector: Network
Access Complexity: Medium
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Adjusted Temporal Score: 6.9
  Exploitability: Unproven
Remediation Level: Official-Fix
Report Confidence: Confirmed
Affected Products: For a full list of affected versions, see references below.
Technical Description:

A vulnerability exists in code responsible for parsing TrueType fonts in Microsoft Windows' win32k.sys kernel module.  A specially crafted font can cause memory corruption that could potentially be leveraged for code execution in the context of the kernel.  Malicious fonts could be embedded in web pages and documents or distributed as stand-alone font files.  The nature of this memory corruption could make reliable exploitation challenging, however the large attack surface and privilege level warrant patching as soon as possible.

Remediation: A patch is available, see references below for details.



Revision History

1.0 Initial publication.

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