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AUSCERT External Security Bulletin Redistribution
ESB-2010.0340
Vulnerabilities in Windows Could Allow Remote Code Execution
14 April 2010
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AusCERT Security Bulletin Summary
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Product: Windows Authenticode Verification
Publisher: Microsoft
Operating System: Windows Server 2008
Windows Server 2003
Windows 7
Windows Vista
Windows XP
Windows 2000
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2010-0487 CVE-2010-0486
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms10-019.mspx
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Microsoft Security Advisory (981210)
Vulnerabilities in Windows Could Allow Remote Code Execution
Published: April 13, 2010
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities in
Windows Authenticode Verification that could allow remote code execution.
An attacker who successfully exploited either 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.
This security update is rated Critical for all supported versions of
Microsoft Windows.
The security update addresses the vulnerabilities by performing additional
verification operations when signing and verifying a portable executable or
cabinet file.
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
Windows XP Service Pack 2
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
Windows Vista Service Pack 2
Windows Vista x64 Edition
Windows Vista x64 Edition Service Pack 1
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for Itanium-based Systems
Mitigating Factors
An attacker who successfully exploited 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.
Vulnerability Information
WinVerifyTrust Signature Validation Vulnerability - CVE-2010-0486
A remote code execution vulnerability exists in the Windows Authenticode
Signature Verification function used for portable executable (PE) and
cabinet file formats. An anonymous attacker could exploit the
vulnerability by modifying an existing signed executable file to
manipulate unverified portions of the signature and file in such a way
as to add malicious code to the file without invalidating the signature.
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.
Cabview Corruption Validation Vulnerability - CVE-2010-0487
A remote code execution vulnerability exists in the Windows Authenticode
Signature verification for cabinet (.cab) file formats. An anonymous
attacker could exploit the vulnerability by modifying an existing signed
cabinet file to point the unverified portions of the signature to
malicious code, and then convincing a user to open or view the specially
crafted cabinet file. 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.
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The University of Queensland
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