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             AUSCERT External Security Bulletin Redistribution

                               ESB-2011.0263
       Critical Vulnerabilities in Windows Media Could Allow Remote
                         Code Execution (2510030)
                               9 March 2011

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

Product:           Windows Media Player
                   Windows Media Center
Publisher:         Microsoft
Operating System:  Windows XP
                   Windows Vista
                   Windows 7
                   Windows Server 2008
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-0042 CVE-2011-0032 

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS11-015.mspx

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Microsoft Security Bulletin MS11-015 - Critical
Vulnerabilities in Windows Media Could Allow Remote Code Execution (2510030)
Version: 1.0

General Information

Executive Summary

This security update resolves one publicly disclosed vulnerability in 
DirectShow and one privately reported vulnerability in Windows Media Player 
and Windows Media Center. The more severe of these vulnerabilities could allow 
remote code execution if a user opens a specially crafted Microsoft Digital 
Video Recording (.dvr-ms) file. In all cases, a user cannot be forced to open 
the file; for an attack to be successful, a user must be convinced to do so.

This security update is rated Critical for affected editions of Windows XP 
(including Windows XP Media Center Edition 2005); all supported editions of 
Windows Vista and Windows 7; and Windows Media Center TV Pack for Windows 
Vista. This security update is rated Important for supported editions of 
Windows Server 2008 R2 for x64-based systems. For more information, see the 
subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by modifying the way 
library files and Windows media files are opened. For more information about 
the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for 
the specific vulnerability entry under the next section, Vulnerability 
Information.

Affected Software

Windows XP Media Center Edition 2005 Service Pack 3 (KB2502898)
Windows XP Service Pack 3 (KB2479943)
Windows XP Professional x64 Edition Service Pack 2 (KB2479943)
Windows Vista Service Pack 1 and Windows Vista Service Pack 2 (KB2479943)
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service 
  Pack 2 (KB2479943)
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service 
  Pack 1 (KB2479943)
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service 
  Pack 1 (KB2479943)
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for 
x64-based Systems Service Pack 1** (KB2479943)

**Server Core installation not affected. The vulnerabilities addressed by this 
update do not affect supported editions of Windows Server 2008 or Windows 
Server 2008 R2 as indicated, when installed using the Server Core installation 
option. 

Vulnerability Information

DirectShow Insecure Library Loading Vulnerability - CVE-2011-0032

A remote code execution vulnerability exists in the way that Microsoft 
DirectShow handles the loading of DLL files. 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.

DVR-MS Vulnerability - CVE-2011-0042

A remote code execution vulnerability exists in the way that Windows Media 
Player and Windows Media Center handle .dvr-ms files. This vulnerability could 
allow an attacker to execute arbitrary code if the attacker convinces a user 
to open a specially crafted .dvr-ms file. An attacker could then install 
programs; view, change, or delete data; or create new accounts with full user 
rights.

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