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AUSCERT External Security Bulletin Redistribution
ESB-2012.0273
Vulnerability in DirectWrite Could Allow Denial of Service
14 March 2012
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AusCERT Security Bulletin Summary
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Product: Windows DirectWrite
Publisher: Microsoft
Operating System: Windows Vista
Windows 7
Windows Server 2008
Windows Server 2008 R2
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2012-0156
Original Bulletin:
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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