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
Description:

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
32.050
Proventia Desktop
Proventia Server IPS (Windows)
2760
Propagation Techniques ISS Protection Available

remote exploit

OTF_Silverlight_Code_Execution*
 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.

References

XFDB: http://xforce.iss.net/xforce/xfdb/75124
Microsoft: http://technet.microsoft.com/en-us/security/bulletin/MS12-034.mspx

Revision History

1.0 Initial publication.

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

About IBM Security Systems

IBM Security Systems include an extensive portfolio of hardware, software solutions, professional and managed services offerings covering the spectrum of IT and business security risks: people and identity, data and information, application and process, network, server and endpoint and physical infrastructure, empowering clients to innovate and operate their businesses on the most secure infrastructure platforms. Through world-class solutions that address risk across the enterprise, IBM helps organizations build a strong security posture that helps reduce costs, improve service, and manage risk. IBM X-Force(R) Research and Development is one of the most renowned commercial security research and development groups in the world. For more information on how to address today's biggest risks, please visit us at ibm.com/security.