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AUSCERT External Security Bulletin Redistribution
ESB-2009.1100
Cumulative Security Update for Internet Explorer (972260)
29 July 2009
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AusCERT Security Bulletin Summary
---------------------------------
Product: Internet Explorer 5.01
Internet Explorer 6
Internet Explorer 6 Service Pack 1
Internet Explorer 7
Internet Explorer 8
Publisher: Microsoft
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote with User Interaction
Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch
CVE Names: CVE-2009-1919 CVE-2009-1918 CVE-2009-1917
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-034.mspx
Comment: As there is a vulnerability in the Microsoft Active Template Library
(ATL), it is possible that third party applications using this library
could also be vulnerable. Anyone who is authoring their own components
and controls utilizing ATL (which may include software other than
ActiveX controls) should use the updated libraries available for
Visual Studio and make their updated software available to their
user-base as soon as practical.
Additionally ICASI have released a scanning service to aid developers
in identifying potential vulnerabilities in ActiveX controls and
components built with Microsoft's Active Template Libraries (ATL). For
details see http://isaci.org
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Microsoft Security Bulletin MS09-034 - Critical
Cumulative Security Update for Internet Explorer (972260)
Published: July 28, 2009
Version: 1.0
General Information
Executive Summary
This security update is being released out of band in conjunction with
Microsoft Security Bulletin MS09-035, which describes vulnerabilities in
those components and controls that have been developed using vulnerable
versions of the Microsoft Active Template Library (ATL). As a
defense-in-depth measure, this Internet Explorer security update helps
mitigate known attack vectors within Internet Explorer for those components
and controls that have been developed with vulnerable versions of ATL as
described in Microsoft Security Advisory (973882) and Microsoft Security
Bulletin MS09-035.
This security update also resolves three privately reported vulnerabilities
in Internet Explorer. These vulnerabilities could allow remote code
execution if a user views 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.
This security update is rated Critical for Internet Explorer 5.01 and
Internet Explorer 6 Service Pack 1, running on supported editions of
Microsoft Windows 2000; Critical for Internet Explorer 6, Internet Explorer
7, and Internet Explorer 8 running on supported editions of Windows XP and
Windows Vista; and Moderate for Internet Explorer 6, Internet Explorer 7,
and Internet Explorer 8 running on supported editions of Windows Server 2003
and Windows Server 2008. For more information, see the subsection, Affected
and Non-Affected Software, in this section.
The security update addresses these vulnerabilities by modifying the way
that Internet Explorer handles objects in memory and table operations. For
more information about the vulnerabilities, see the Frequently Asked
Questions (FAQ) subsection 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
Internet Explorer 5.01 and Internet Explorer 6 Service Pack 1
Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Microsoft Windows 2000 Service Pack 4
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
*Windows Server 2008 Server Core installation not affected. The
vulnerabilities addressed by this update do not affect supported
editions of Windows Server 2008 if Windows Server 2008 was installed
using the Server Core installation option. For more information on this
installation option, see Server Core. Note that the Server Core
installation option does not apply to certain editions of Windows Server
2008; see Compare Server Core Installation Options.
Non-Affected Software
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows 7 for Itanium-based Systems
Vulnerability Information
Memory Corruption Vulnerability - CVE-2009-1917
A remote code execution vulnerability exists in the way that Internet
Explorer handles a memory object. 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. 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.
HTML Objects Memory Corruption Vulnerability - CVE-2009-1918
A remote code execution vulnerability exists in the way that Internet
Explorer handles table operations in specific situations. 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. 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.
Uninitialized Memory Corruption Vulnerability - CVE-2009-1919
A remote code execution vulnerability exists in the way Internet Explorer
accesses an object that 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. 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.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
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