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Microsoft Security Bulletin MS09-051 - Critical

Vulnerabilities in Windows Media Runtime Could Allow Remote Code Execution (975682)

Published: | Updated:

Version: 2.0

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.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. None

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software

Operating SystemComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Windows 2000 Service Pack 4DirectShow WMA Voice Codec
(KB969878)

Windows Media Audio Voice Decoder
(KB954155)

Audio Compression Manager
(KB975025)
Remote Code ExecutionCriticalNone
Windows XP Service Pack 2DirectShow WMA Voice Codec
(KB969878)

Windows Media Audio Voice Decoder
(KB954155)

Audio Compression Manager
(KB975025)
Remote Code ExecutionCriticalNone
Windows XP Service Pack 3DirectShow WMA Voice Codec
(KB969878)

Windows Media Audio Voice Decoder
(KB954155)

Audio Compression Manager
(KB975025)
Remote Code ExecutionCriticalNone
Windows XP Professional x64 Edition Service Pack 2DirectShow WMA Voice Codec
(KB969878)

Windows Media Audio Voice Decoder
(KB954155)

Windows Media Audio Voice Decoder in Windows Media Format SDK 9.5 x64 Edition
(KB954155)

Windows Media Audio Voice Decoder in Windows Media Format SDK 11
(KB954155)

Audio Compression Manager
(KB975025)
Remote Code ExecutionCriticalNone
Windows Server 2003 Service Pack 2DirectShow WMA Voice Codec
(KB969878)

Windows Media Audio Voice Decoder
(KB954155)

Audio Compression Manager
(KB975025)
Remote Code ExecutionCriticalNone
Windows Server 2003 x64 Edition Service Pack 2DirectShow WMA Voice Codec
(KB969878)

Windows Media Audio Voice Decoder
(KB954155)

Windows Media Audio Voice Decoder in Windows Media Format SDK 9.5 x64 Edition
(KB954155)

Audio Compression Manager
(KB975025)
Remote Code ExecutionCriticalNone
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2Windows Media Audio Voice Decoder
(KB954155)
Remote Code ExecutionCriticalNone
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2Windows Media Audio Voice Decoder
(KB954155)
Remote Code ExecutionCriticalNone
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2*Windows Media Audio Voice Decoder
(KB954155)
Remote Code ExecutionCriticalNone
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2*Windows Media Audio Voice Decoder
(KB954155)
Remote Code ExecutionCriticalNone

*Windows Server 2008 Server Core installation not affected. The vulnerability addressed by this update does not affect supported editions of Windows Server 2008 if Windows Server 2008 was installed using the Server Core installation option. For more information on this installation option, see Server Core. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008; see Compare Server Core Installation Options.

Non-Affected Software

Operating System
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for Itanium-based Systems

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Windows Media Runtime Voice Sample Rate Vulnerability - CVE-2009-0555

Windows Media Runtime Heap Corruption Vulnerability - CVE-2009-2525

Update Information

Detection and Deployment Tools and Guidance

Security Update Deployment

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

  • Ivan Fratric of Zero Day Initiative and Jun Xie of McAfee Avert Labs for reporting the Windows Media Runtime Voice Sample Rate Vulnerability (CVE-2009-0555)
  • Vinay Anantharaman of Adobe Systems, Inc. for reporting the Windows Media Runtime Heap Corruption Vulnerability (CVE-2009-2525)

Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

  • Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

  • V1.0 (October 13, 2009): Bulletin published.
  • V1.1 (October 14, 2009): Clarified the entry, "I have Windows Media Player installed on my system. Why am I not being offered some of the updates?" in the FAQ section. Also corrected the FAQ for CVE-2009-0555 to indicate that Microsoft is aware of limited attacks attempting to exploit the vulnerability.
  • V2.0 (November 10, 2009): Bulletin revised to communicate the rerelease of the update for Audio Compression Manager on Microsoft Windows 2000 Service Pack 4 to fix a detection issue. This is a detection change only; there were no changes to the binaries. Customers who have successfully updated their systems do not need to reinstall this update. Also corrected the registry key verification for DirectShow WMA Voice Codec on Windows Server 2003.