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AUSCERT External Security Bulletin Redistribution
ESB-2009.1400
Vulnerabilities in Windows Media Runtime Could Allow Remote Code Execution
14 October 2009
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AusCERT Security Bulletin Summary
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Product: Windows Media Runtime
Publisher: Microsoft
Operating System: Windows 2000
Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Impact/Access: Administrator Compromise -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2009-0555
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-051.mspx
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Microsoft Security Bulletin MS09-051 - Critical
Vulnerabilities in Windows Media Runtime Could Allow Remote Code Execution
(975682)
Published: October 13, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities in
Windows Media Runtime. The vulnerabilities could allow remote code execution
if a user opened a specially crafted media file or received specially crafted
streaming content from a Web site or any application that delivers Web
content. An attacker who successfully exploited these vulnerabilities could
gain the same user rights as the local user. Users whose accounts are
configured to have fewer user rights on the system could be less impacted
than users who operate with administrative user rights.
This security update is rated Critical for DirectShow WMA Voice Codec,
Windows Media Audio Voice Decoder, and Audio Compression Manager on supported
editions of Microsoft Windows 2000; Windows XP; Windows Server 2003, except
for Itanium-based editions; Windows Vista; and Windows Server 2008, except
for Itanium-based editions. For more information, see the subsection,
Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by changing the manner in
which the Windows Media Runtime processes ASF files and initializes functions
in compressed audio files. For more information about the vulnerabilities,
see the Frequently Asked Questions (FAQ) subsection for the specific
vulnerability entry under the next section, Vulnerability Information.
Recommendation. The majority of customers have automatic updating enabled and
will not need to take any action because this security update will be
downloaded and installed automatically. Customers who have not enabled
automatic updating need to check for updates and install this update
manually. For information about specific configuration options in automatic
updating, see Microsoft Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want to
install this security update manually, Microsoft recommends that customers
apply the update immediately using update management software, or by checking
for updates using the Microsoft Update service.
Known Issues. None
Affected Software
Microsoft Windows 2000 Service Pack 4: DirectShow WMA Voice Codec, Windows
Media Audio Voice Decoder, Audio Compression Manager
Windows XP Service Pack 2 and Windows XP Service Pack 3: DirectShow WMA Voice
Codec, Windows Media Audio Voice Decoder Audio Compression Manager
Windows XP Professional x64 Edition Service Pack 2: DirectShow WMA Voice
Codec, Windows Media Audio Voice Decoder, Windows Media Audio Voice Decoder
in Windows Media Format SDK 9.5 x64 Edition, Windows Media Audio Voice
Decoder in Windows Media Format SDK 11, Audio Compression Manager
Windows Server 2003 Service Pack 2: DirectShow WMA Voice Codec, Windows Media
Audio Voice Decoder, Audio Compression Manager
Windows Server 2003 x64 Edition Service Pack 2: DirectShow WMA Voice Codec,
Windows Media Audio Voice Decoder, Windows Media Audio Voice Decoder in
Windows Media Format SDK 9.5 x64 Edition, Audio Compression Manager
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service
Pack 2: Windows Media Audio Voice Decoder
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and
Windows Vista x64 Edition Service Pack 2: Windows Media Audio Voice Decoder
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit
Systems Service Pack 2 (Windows Server 2008 Server Core installation not
affected): Windows Media Audio Voice Decoder
Windows Server 2008 for x64-based Systems and Windows Server 2008 for
x64-based Systems Service Pack 2 (Windows Server 2008 Server Core
installation not affected): Windows Media Audio Voice Decoder
Vulnerability Information
Windows Media Runtime Voice Sample Rate Vulnerability - CVE-2009-0555
A remote code execution vulnerability exists in Windows Media Player due
to the improper processing of specially crafted Advanced Systems Format
(ASF) files. An attacker could exploit the vulnerability by constructing a
specially crafted audio file that could allow remote code execution when
played using an affected version of Windows Media Player. An attacker who
successfully exploited this vulnerability could take complete control of an
affected system.
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The University of Queensland
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