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AA-2009.0131                  AUSCERT Advisory

                                   [Win]
               Microsoft DirectShow: Execute Arbitrary Code
                                1 June 2009
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        AusCERT Advisory Summary
        ------------------------

Product:              DirectX 7.0 on Microsoft Windows 2000 Service Pack 4
                      DirectX 8.1 on Microsoft Windows 2000 Service Pack 4
                      DirectX 9.0 on Microsoft Windows 2000 Service Pack 4
                      DirectX 9.0 on Windows XP Service Pack 2 and Windows 
                        XP Service Pack 3
                      DirectX 9.0 on Windows XP Professional x64 Edition 
                        Service Pack 2
                      DirectX 9.0 on Windows Server 2003 Service Pack 2
                      DirectX 9.0 on Windows Server 2003 x64 Edition Service 
                        Pack 2
                      DirectX 9.0 on Windows Server 2003 with SP2 for 
                        Itanium-based Systems
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-1537
Member content until: Friday, June 26 2009

Revision History:     June 1 2009: Added CVE
                      May 29 2009: Initial Release

OVERVIEW:
 
       A vulnerability in Microsoft DirectX, which could allow remote 
       execution of arbitrary code, is currently being investigated.
            

IMPACT:

       This vulnerability, which may allow remote execution of arbitrary 
       code, could be exploited if a user was tricked into opening a 
       malformed QuickTime media file. It has been established Windows 
       2000 Service Pack 4, Windows XP, and Windows Server 2003 are 
       vulnerable, however all versions of Windows Vista and Windows 
       Server 2008 are unaffected. Active exploitation of this vulnerability 
       has been confirmed. [1]      


MITIGATION:

       This issue is still under investigation and currently there is no
       patch available.
       Microsoft has suggested some workarounds, such as:

         - Disabling the parsing of QuickTime content in quartz.dll
         - Modifying the Access Control List on quartz.dll
         - Unregistering quartz.dll
       
       For further details and mitigation strategies, please refer to the
       Microsoft website. [1]


REFERENCES:

       [1] Microsoft Security Advisory (971778)
           http://www.microsoft.com/technet/security/advisory/971778.mspx

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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