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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1049
        Vulnerabilities in Microsoft DirectShow Could Allow Remote
                          Code Execution (971633)
                               15 July 2009

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

Product:           Microsoft DirectShow
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch
CVE Names:         CVE-2009-1539 CVE-2009-1538 CVE-2009-1537

Reference:         AA-2009.0131

Original Bulletin: 
   http://www.microsoft.com/technet/security/bulletin/MS09-028.mspx

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Microsoft Security Bulletin MS09-028 - Critical

Vulnerabilities in Microsoft DirectShow Could Allow Remote Code Execution 
(971633)

Published: July 14, 2009

Version: 1.0

General Information

Executive Summary

   This security update resolves one publicly disclosed vulnerability and 
   two privately reported vulnerabilities in Microsoft DirectShow. The 
   vulnerabilities could allow remote code execution if a user opened a 
   specially crafted QuickTime media file. An attacker who successfully 
   exploited any of 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 all supported editions of 
   Microsoft Windows 2000, Windows XP, and Windows Server 2003. For more 
   information, see the subsection, Affected and Non-Affected Software, in 
   this section.

   The security update addresses the vulnerabilities by correcting the way 
   that DirectShow parses QuickTime media files and validates pointer values 
   and size fields within QuickTime media 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.

   This security update also addresses the vulnerability first described in 
   Microsoft Security Advisory 971778.

   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.

Affected Software

   Microsoft Windows 2000 Service Pack 4 with DirectX 7.0
   Microsoft Windows 2000 Service Pack 4 with DirectX 8.1
   Microsoft Windows 2000 Service Pack 4 with DirectX 9.0*
   Windows XP Service Pack 2 and Windows XP Service Pack 3 with DirectX 9.0*
   Windows XP Professional x64 Edition Service Pack 2 with DirectX 9.0*
   Windows Server 2003 Service Pack 2 with DirectX 9.0*
   Windows Server 2003 x64 Edition Service Pack 2 with DirectX 9.0*
   Windows Server 2003 with SP2 for Itanium-based Systems with DirectX 9.0*

   *The update for DirectX 9.0 also applies to DirectX 9.0a, DirectX 9.0b, 
    and DirectX 9.0c.

Vulnerability Information
	
   DirectX NULL Byte Overwrite Vulnerability - CVE-2009-1537

   A remote code execution vulnerability exists in the way that Microsoft 
   DirectShow parses QuickTime media files. This vulnerability could allow 
   code execution if a user opened a specially crafted QuickTime file. If a 
   user is logged on with administrative user rights, an attacker who 
   successfully exploited this vulnerability could take complete control of 
   an affected system. An attacker could then install programs; view, 
   change, or delete data; or create new accounts with full user rights. 
   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.

   DirectX Pointer Validation Vulnerability - CVE-2009-1538

   A remote code execution vulnerability exists in the way that Microsoft 
   DirectShow validates certain values when updating a pointer. This 
   vulnerability could allow code execution if a user opened a specially 
   crafted QuickTime file. If a user is logged on with administrative user 
   rights, an attacker who successfully exploited this vulnerability could 
   take complete control of an affected system. An attacker could then 
   install programs; view, change, or delete data; or create new accounts 
   with full user rights. 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.

   DirectX Size Validation Vulnerability - CVE-2009-1539

   A remote code execution vulnerability exists in the way that Microsoft 
   DirectShow validates specific fields in QuickTime media files. This 
   vulnerability could allow code execution if a user opened a specially 
   crafted QuickTime file. If a user is logged on with administrative user 
   rights, an attacker who successfully exploited this vulnerability could 
   take complete control of an affected system. An attacker could then 
   install programs; view, change, or delete data; or create new accounts 
   with full user rights. 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.

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