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                                CERT-Renater

                      Note d'Information No. 2012/VULN122
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DATE                : 14/03/2012

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S) : Windows version 7, Vista, Server 2008,
                  running Microsoft Expression Design version 1, 2, 3, 4.

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KB2665364
http://technet.microsoft.com/en-us/security/bulletin/ms12-019
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Microsoft Security Bulletin MS12-019 - Moderate Vulnerability in
DirectWrite Could Allow Denial of Service (2665364)

   Published: Tuesday, March 13, 2012

   Version: 1.0

General Information

Executive Summary

   This security update resolves a publicly disclosed vulnerability in
   Windows DirectWrite. In an Instant Messenger-based attack scenario, the
   vulnerability could allow denial of service if an attacker sends a
   specially crafted sequence of Unicode characters directly to an Instant
   Messenger client. The target application could become unresponsive when
   DirectWrite renders the specially crafted sequence of Unicode
   characters.

   This security update is rated Moderate for all supported editions of
   Windows Vista, Windows Server 2008 (except Windows Server 2008 for
   Itanium-based Systems), Windows 7, and Windows Server 2008 R2. For more
   information, see the subsection, Affected Software, in this section.

Affected Software
   Windows Vista Service Pack 2
   Windows Vista x64 Edition Service Pack 2
   Windows Server 2008 for 32-bit Systems Service Pack 2
   Windows Server 2008 for x64-based Systems Service Pack 2
   Windows 7 for 32-bit Systems
   Windows 7 for 32-bit Systems Service Pack 1
   Windows 7 for x64-based Systems
   Windows 7 for x64-based Systems Service Pack 1
   Windows Server 2008 R2 for x64-based Systems
   Windows Server 2008 R2 for x64-based Systems Service Pack 1
   Windows Server 2008 R2 for Itanium-based Systems
   Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Vulnerability Information

DirectWrite Application Denial of Service Vulnerability - CVE-2012-0156

   A denial of service vulnerability exists in the way that DirectWrite
   renders a specially crafted sequence of Unicode characters. An attacker
   who successfully exploited this vulnerability could cause a target
   application to stop responding.


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