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AUSCERT External Security Bulletin Redistribution
ESB-2011.1023
Cumulative Security Update for Internet Explorer (2586448)
12 October 2011
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AusCERT Security Bulletin Summary
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Product: Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Internet Explorer 9
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-2011-2001 CVE-2011-2000 CVE-2011-1999
CVE-2011-1998 CVE-2011-1997 CVE-2011-1996
CVE-2011-1995 CVE-2011-1993
Original Bulletin:
http://technet.microsoft.com/en-us/security/bulletin/ms11-081
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Microsoft Security Bulletin MS11-081 - Critical
Cumulative Security Update for Internet Explorer (2586448)
Published: Tuesday, October 11, 2011
Version: 1.0
General Information
Executive Summary
This security update resolves eight privately reported vulnerabilities in
Internet Explorer. The most severe vulnerabilities could allow remote code
execution if a user views a specially crafted Web page using Internet Explorer.
An attacker who successfully exploited any of 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.
This security update is rated Critical for Internet Explorer on Windows clients
and Moderate for Internet Explorer on Windows servers.
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 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
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
Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Internet Explorer 9
Vulnerability Information
Scroll Event Remote Code Execution Vulnerability - CVE-2011-1993
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has been deleted. The vulnerability may corrupt memory
in such a way that an attacker could execute arbitrary code in the context of
the logged-on user.
OLEAuto32.dll Remote Code Execution Vulnerability - CVE-2011-1995
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized. The vulnerability
may corrupt memory in such a way that an attacker could execute arbitrary code
in the context of the logged-on user.
Option Element Remote Code Execution Vulnerability - CVE-2011-1996
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has been deleted. The vulnerability may corrupt memory
in such a way that an attacker could execute arbitrary code in the context of
the logged-on user.
OnLoad Event Remote Code Execution Vulnerability - CVE-2011-1997
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has been deleted. The vulnerability may corrupt memory
in such a way that an attacker could execute arbitrary code in the context of
the logged-on user.
Jscript9.dll Remote Code Execution Vulnerability - CVE-2011-1998
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has not been correctly initialized. The vulnerability
may corrupt memory in such a way that an attacker could execute arbitrary code
in the context of the logged-on user.
Select Element Remote Code Execution Vulnerability - CVE-2011-1999
A remote code execution vulnerability exists in the way that Internet Explorer
accesses a dereferenced memory address. The vulnerability may corrupt memory in
such a way that an attacker could execute arbitrary code in the context of the
logged-on user.
Body Element Remote Code Execution Vulnerability - CVE-2011-2000
A remote code execution vulnerability exists in the way that Internet Explorer
accesses an object that has been deleted. The vulnerability may corrupt memory
in such a way that an attacker could execute arbitrary code in the context of
the logged-on user.
Virtual Function Table Corruption Remote Code Execution Vulnerability -
CVE-2011-2001
A remote code execution vulnerability exists in the way that Internet Explorer
accesses a virtual function table after it has been corrupted. The vulnerability
may corrupt memory in such a way that an attacker could execute arbitrary code
in the context of the logged-on user.
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The University of Queensland
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Qld 4072
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