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AUSCERT External Security Bulletin Redistribution
ESB-2009.1175
Vulnerabilities in Windows Media File Processing Could Allow
Remote Code Execution (971557)
12 August 2009
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AusCERT Security Bulletin Summary
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Product: Windows Media File Processing
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2009-1546 CVE-2009-1545
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-038.mspx
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Microsoft Security Bulletin MS09-038 - Critical
Vulnerabilities in Windows Media File Processing Could Allow Remote Code
Execution (971557)
Published: August 11, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities
in Windows Media file processing. Either vulnerability could allow
remote code execution if a user opened a specially crafted AVI 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.
This security update is rated Critical for all supported editions of
Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows
Vista, and Windows Server 2008. For more information, see the
subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by correcting the
manner in which AVI headers are processed and correcting the manner in
which AVI data is validated. For more information about the
vulnerabilities, see the Frequently Asked Questions (FAQ) subsection
for the specific vulnerability entry under the next section,
Vulnerability Information.
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
Windows XP Service Pack 2 and Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista, Windows Vista Service Pack 1, and Windows Vista
Service Pack 2
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack
1, and Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for
32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems and Windows Server 2008
for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems and Windows Server
2008 for Itanium-based Systems Service Pack 2
Vulnerability Information
Malformed AVI Header Vulnerability - CVE-2009-1545
A remote code execution vulnerability exists in the way Microsoft
Windows handles specially crafted AVI format files. This vulnerability
could allow code execution if a user opened a specially crafted AVI
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.
AVI Integer Overflow Vulnerability - CVE-2009-1546
A remote code execution vulnerability exists in the way Microsoft
Windows handles specially crafted AVI format files. This vulnerability
could allow code execution if a user opened a specially crafted AVI
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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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
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