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AUSCERT External Security Bulletin Redistribution
ESB-2011.0632
Vulnerability in MHTML Could Allow Information Disclosure (2544893)
15 June 2011
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AusCERT Security Bulletin Summary
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Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Impact/Access: Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2011-1894
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS11-037.mspx
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Microsoft Security Bulletin MS11-037 - Important
Vulnerability in MHTML Could Allow Information Disclosure (2544893)
Version: 1.0
General Information
Executive Summary
This security update resolves a publicly disclosed vulnerability in the MHTML
protocol handler in Microsoft Windows. The vulnerability could allow
information disclosure if a user opens a specially crafted URL from an
attacker's web site. An attacker would have to convince the user to visit the
web site, typically by getting them to follow a link in an e-mail message or
Instant Messenger message.
This security update is rated Important for all supported editions of Windows
XP, Windows Vista, and Windows 7, and is rated Low for all supported editions
of Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2. For
more information, see the subsection, Affected and Non-Affected Software, in
this section.
Affected Software
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 Service Pack 1 and Windows Vista Service Pack 2
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
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service
Pack 1
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for
x64-based Systems Service Pack 1**
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2
for Itanium-based Systems Service Pack 1
Vulnerability Information
MHTML Mime-Formatted Request Vulnerability - CVE-2011-1894
An information disclosure vulnerability exists in the way that MHTML
interprets MIME-formatted requests for content that are embedded in an HTML
document. Similar to server-side cross-site scripting (XSS) vulnerabilities,
it is possible under certain conditions for this vulnerability to allow an
attacker to inject a client-side script in the response to a web request run
in the context of the user's instance of Internet Explorer.
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