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                         AUSCERT Security Bulletin

                              ASB-2009.1004.3
          Microsoft video streaming ActiveX control vulnerability
                                7 July 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Microsoft video streaming ActiveX control
Operating System:     Windows XP
                      Windows Server 2003
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:           Mitigation
CVE Names:            CVE-2008-0015  
Member content until: Wednesday, August  5 2009

Comment: The initial release of this alert indicated that all versions of
         Windows is affected by this issue. Current information indicates
         that only Windows XP and Windows Server 2003 are affected.

Revision History:     July 7 2009: Updated mitigation information
                      July 7 2009: Added CVE Reference, mitigation and
                                   vendor confirmation
                      July 6 2009: Initial Release

OVERVIEW

        Microsoft video streaming ActiveX control MsVidCtl is currently being
        used to silently install malware on unsuspecting victims. [1]


IMPACT

        The vulnerability allows remote code execution with the current
        users' privileges.


MITIGATION

        Currently there is no patch to correct this issue, however Microsoft
        have released an update that will disable the affected ActiveX control
        as well as several others that are recommended to be disabled [1,3,4].
        
        If the Microsoft patch is not able to be installed, you can set the
        killbit [2] to mitigate this vulnerability yourself by saving the
        included text below as a .REG file and importing into your registry.
               
        --- BEGIN INCLUDED TEXT ---
        Windows Registry Editor Version 5.00
        
        [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{0955AC62-BF2E-4CBA-A2B9-A63F772D46CF}]
        "Compatibility Flags"=dword:00000400
               
        --- END INCLUDED TEXT ---
        
        The full list of killbits disabled by the Microsoft patch can be found
        in the workaround section of Microsoft Security Advisory 972890 [1].


REFERENCES

        [1] Microsoft Security Advisory (972890)
            http://www.microsoft.com/technet/security/advisory/972890.mspx

        [2] How to stop an ActiveX control from running in Internet Explorer
            http://support.microsoft.com/kb/240797

        [3] Microsoft Help and Support
            http://support.microsoft.com/kb/972890

        [4] Microsoft Fix it Download
            http://go.microsoft.com/?linkid=9672398

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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