VUPEN Security Research - Microsoft Windows OpenType CFF Driver Stack 
Overflow Vulnerability (CVE-2011-0034)

http://www.vupen.com/english/research.php


I. BACKGROUND
---------------------

"Microsoft Windows is a series of software operating systems and graphical
user interfaces produced by Microsoft. Windows had approximately 90% of
the market share of the client operating systems." (Wikipedia)


II. DESCRIPTION
---------------------

VUPEN Vulnerability Research Team discovered a critical vulnerability
in Microsoft Windows.

The vulnerability is caused by a stack overflow error in the OpenType
Compact Font Format (CFF) driver "ATMFD.dll" when processing certain
operands within an OpenType font, which could be exploited by remote
attackers to execute arbitrary code on a vulnerable Windows 7, Windows
Server 2008, Windows Server 2008 R2, and Windows Vista systems via a
malicious font, or by local attackers to gain elevated privileges on
Windows XP and Windows Server 2003 systems via a malicious application.

CVSS Score: 10 (AV:N/AC:L/Au:N/C:C/I:C/A:C)


III. AFFECTED PRODUCTS
---------------------------

Microsoft Windows XP Service Pack 3
Microsoft Windows XP Professional x64 Edition Service Pack 2
Microsoft Windows Server 2003 Service Pack 2
Microsoft Windows Server 2003 x64 Edition Service Pack 2
Microsoft Windows Server 2003 SP2 (Itanium)
Microsoft Windows Vista Service Pack 1
Microsoft Windows Vista Service Pack 2
Microsoft Windows Vista x64 Edition Service Pack 1
Microsoft Windows Vista x64 Edition Service Pack 2
Microsoft Windows Server 2008 (32-bit)
Microsoft Windows Server 2008 (32-bit) Service Pack 2
Microsoft Windows Server 2008 (64x)
Microsoft Windows Server 2008 (64x) Service Pack 2
Microsoft Windows Server 2008 (Itanium)
Microsoft Windows Server 2008 (Itanium) Service Pack 2
Microsoft Windows 7 (32-bit)
Microsoft Windows 7 (32-bit) Service Pack 1
Microsoft Windows 7 (64x)
Microsoft Windows 7 (64x) Service Pack 1
Microsoft Windows Server 2008 R2 (64x)
Microsoft Windows Server 2008 R2 (64x) Service Pack 1
Microsoft Windows Server 2008 R2 (Itanium)
Microsoft Windows Server 2008 R2 (Itanium) Service Pack 1


IV. Binary Analysis & Exploits/PoCs
---------------------------------------

In-depth binary analysis of the vulnerability and a proof-of-concept code
are available through the VUPEN Binary Analysis & Exploits Service :

http://www.vupen.com/english/services/ba-index.php


V. VUPEN Threat Protection Program
-----------------------------------

To proactively protect critical networks and infrastructures against 
unpatched
vulnerabilities and reduce risks related to zero-day attacks, VUPEN shares 
its
vulnerability research with governments and organizations members of the 
VUPEN
Threat Protection Program (TPP).

VUPEN TPP customers receive fully detailed and technical reports about 
security
vulnerabilities discovered by VUPEN and in advance of their public 
disclosure.

http://www.vupen.com/english/services/tpp-index.php


VI. SOLUTION
----------------

Apply the MS11-032 security update.


VII. CREDIT
--------------

This vulnerability was discovered by Sebastien Renaud of VUPEN Security


VIII. ABOUT VUPEN Security
---------------------------

VUPEN is a leading IT security research company providing vulnerability
management and security intelligence solutions which enable enterprises
and institutions to eliminate vulnerabilities before they can be exploited,
ensure security policy compliance and meaningfully measure and manage risks.

Governmental and federal agencies, and global enterprises in the financial
services, insurance, manufacturing and technology industries rely on VUPEN
to improve their security, prioritize resources, cut time and costs, and
stay ahead of the latest threats.

* VUPEN Vulnerability Notification Service (VNS) :
http://www.vupen.com/english/services/vns-index.php

* VUPEN Binary Analysis & Exploits Service (BAE) :
http://www.vupen.com/english/services/ba-index.php

* VUPEN Threat Protection Program for Govs (TPP) :
http://www.vupen.com/english/services/tpp-index.php

* VUPEN Web Application Security Scanner (WASS) :
http://www.vupen.com/english/services/wass-index.php


IX. REFERENCES
----------------------

http://www.vupen.com/english/research-vuln.php
http://www.vupen.com/english/advisories/2011/0950
http://www.microsoft.com/technet/security/Bulletin/MS11-032.mspx


X. DISCLOSURE TIMELINE
-----------------------------

2011-03-02 - Vulnerability Discovered by VUPEN
2011-04-12 - MS11-032 security update available