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AUSCERT External Security Bulletin Redistribution
ESB-2011.0631
Vulnerability in Vector Markup Language Could Allow Remote
Code Execution (2544521)
15 June 2011
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AusCERT Security Bulletin Summary
---------------------------------
Product: Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2011-1266
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS11-052.mspx
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Microsoft Security Bulletin MS11-052 - Critical
Vulnerability in Vector Markup Language Could Allow Remote Code Execution
(2544521)
Version: 1.0
General Information
Executive Summary
This security update resolves a privately reported vulnerability in the
Microsoft implementation of Vector Markup Language (VML). This security update
is rated Critical for Internet Explorer 6, Internet Explorer 7, and Internet
Explorer 8 on Windows clients; and Moderate for Internet Explorer 6, Internet
Explorer 7, and Internet Explorer 8 on Windows servers. Internet Explorer 9 is
not affected by the vulnerability. For more information, see the subsection,
Affected and Non-Affected Software, in this section.
The vulnerability could allow remote code execution if a user viewed a
specially crafted Web page using Internet Explorer. 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.
Affected Software
Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
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
VML Memory Corruption Vulnerability - CVE-2011-1266
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized or has been deleted.
An attacker could exploit the vulnerability by constructing a specially crafted
Web page. When a user views the Web page, the vulnerability could allow remote
code execution. An attacker who successfully exploited this vulnerability could
gain the same user rights as the logged-on user.
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The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
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