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                                    CERT-Renater

                         Note d'Information No. 2011/VULN202
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DATE                      : 09/03/2011

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       :  Windows XP, Windows Vista, Windows 7, Windows Server 2008
                               running Windows Media Player, Windows Media Center.

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KB2510030
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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