Microsoft Security Bulletin MS11-081 - Critical

Cumulative Security Update for Internet Explorer (2586448)

Published: | Updated:

Version: 1.2

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. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The update addresses the vulnerabilities by modifying the way that Internet Explorer handles objects in memory and the way that Internet Explorer allocates and accesses memory. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry 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.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. Microsoft Knowledge Base Article 2586448 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues. When currently known issues and recommended solutions pertain only to specific releases of this software, this article provides links to further articles.

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software

Operating SystemComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by This Update
Internet Explorer 6
Windows XP Service Pack 3Internet Explorer 6Remote Code ExecutionCriticalMS11-057
Windows XP Professional x64 Edition Service Pack 2Internet Explorer 6Remote Code ExecutionCriticalMS11-057
Windows Server 2003 Service Pack 2Internet Explorer 6Remote Code ExecutionModerateMS11-057
Windows Server 2003 x64 Edition Service Pack 2Internet Explorer 6Remote Code ExecutionModerateMS11-057
Windows Server 2003 with SP2 for Itanium-based SystemsInternet Explorer 6Remote Code ExecutionModerateMS11-057
Internet Explorer 7
Windows XP Service Pack 3Internet Explorer 7Remote Code ExecutionCriticalMS11-057
Windows XP Professional x64 Edition Service Pack 2Internet Explorer 7Remote Code ExecutionCriticalMS11-057
Windows Server 2003 Service Pack 2Internet Explorer 7Remote Code ExecutionModerateMS11-057
Windows Server 2003 x64 Edition Service Pack 2Internet Explorer 7Remote Code ExecutionModerateMS11-057
Windows Server 2003 with SP2 for Itanium-based SystemsInternet Explorer 7Remote Code ExecutionModerateMS11-057
Windows Vista Service Pack 2Internet Explorer 7Remote Code ExecutionCriticalMS11-057
Windows Vista x64 Edition Service Pack 2Internet Explorer 7Remote Code ExecutionCriticalMS11-057
Windows Server 2008 for 32-bit Systems Service Pack 2Internet Explorer 7**Remote Code ExecutionModerateMS11-057
Windows Server 2008 for x64-based Systems Service Pack 2Internet Explorer 7**Remote Code ExecutionModerateMS11-057
Windows Server 2008 for Itanium-based Systems Service Pack 2Internet Explorer 7Remote Code ExecutionModerateMS11-057
Internet Explorer 8
Windows XP Service Pack 3Internet Explorer 8Remote Code ExecutionCriticalMS11-057
Windows XP Professional x64 Edition Service Pack 2Internet Explorer 8Remote Code ExecutionCriticalMS11-057
Windows Server 2003 Service Pack 2Internet Explorer 8Remote Code ExecutionModerateMS11-057
Windows Server 2003 x64 Edition Service Pack 2Internet Explorer 8Remote Code ExecutionModerateMS11-057
Windows Vista Service Pack 2Internet Explorer 8Remote Code ExecutionCriticalMS11-057
Windows Vista x64 Edition Service Pack 2Internet Explorer 8Remote Code ExecutionCriticalMS11-057
Windows Server 2008 for 32-bit Systems Service Pack 2Internet Explorer 8**Remote Code ExecutionModerateMS11-057
Windows Server 2008 for x64-based Systems Service Pack 2Internet Explorer 8**Remote Code ExecutionModerateMS11-057
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1Internet Explorer 8Remote Code ExecutionCriticalMS11-057
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1Internet Explorer 8Remote Code ExecutionCriticalMS11-057
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1Internet Explorer 8**Remote Code ExecutionModerateMS11-057
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1Internet Explorer 8Remote Code ExecutionModerateMS11-057
Internet Explorer 9
Windows Vista Service Pack 2Internet Explorer 9Remote Code ExecutionCriticalMS11-057
Windows Vista x64 Edition Service Pack 2Internet Explorer 9Remote Code ExecutionCriticalMS11-057
Windows Server 2008 for 32-bit Systems Service Pack 2Internet Explorer 9**Remote Code ExecutionModerateMS11-057
Windows Server 2008 for x64-based Systems Service Pack 2Internet Explorer 9**Remote Code ExecutionModerateMS11-057
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1Internet Explorer 9Remote Code ExecutionCriticalMS11-057
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1Internet Explorer 9Remote Code ExecutionCriticalMS11-057
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1Internet Explorer 9**Remote Code ExecutionModerateMS11-057

**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, when installed using the Server Core installation option. For more information on this installation option, see the TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Scroll Event Remote Code Execution Vulnerability - CVE-2011-1993

OLEAuto32.dll Remote Code Execution Vulnerability - CVE-2011-1995

Option Element Remote Code Execution Vulnerability - CVE-2011-1996

OnLoad Event Remote Code Execution Vulnerability - CVE-2011-1997

Jscript9.dll Remote Code Execution Vulnerability - CVE-2011-1998

Select Element Remote Code Execution Vulnerability - CVE-2011-1999

Body Element Remote Code Execution Vulnerability - CVE-2011-2000

Virtual Function Table Corruption Remote Code Execution Vulnerability - CVE-2011-2001

Update Information

Detection and Deployment Tools and Guidance

Security Update Deployment

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

  • Vishwas Sharma of McAfee Labs for reporting the Scroll Event Remote Code Execution Vulnerability (CVE-2011-1993)
  • David Bloom of Greplin for reporting the OLEAuto32.dll Remote Code Execution Vulnerability (CVE-2011-1995)
  • Ivan Fratric, working with TippingPoint's Zero Day Initiative, for reporting the Option Element Remote Code Execution Vulnerability (CVE-2011-1996)
  • GWSlabs, working with VeriSign iDefense Labs, for reporting the OnLoad Event Remote Code Execution Vulnerability (CVE-2011-1997)
  • David Bloom of Greplin for reporting the Jscript9.dll Remote Code Execution Vulnerability (CVE-2011-1998)
  • Ivan Fratric, working with TippingPoint's Zero Day Initiative, for reporting the Select Element Remote Code Execution Vulnerability (CVE-2011-1999)
  • Sebastian Apelt, working with TippingPoint's Zero Day Initiative, for reporting the Body Element Remote Code Execution Vulnerability (CVE-2011-2000)
  • An anonymous researcher, working with TippingPoint's Zero Day Initiative, for reporting the Virtual Function Table Corruption Remote Code Execution Vulnerability (CVE-2011-2001)
  • Eduardo Vela Nava of Google Inc. and David Bloom of Greplin for working with us on defense-in-depth changes included in this bulletin
  • Soroush Dalili for working with us on defense-in-depth changes included in this bulletin
  • Billy Rios of Google Inc. for working with us on defense-in-depth changes included in this bulletin

Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

  • Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

  • V1.0 (October 11, 2011): Bulletin published.
  • V1.1 (October 12, 2011): Added a link to Microsoft Knowledge Base Article 2586448 under Known Issues in the Executive Summary.
  • V1.2 (November 2, 2011): Announced the release of a hotfix to resolve a known issue affecting Internet Explorer 7 customers after the KB2586448 security update is installed. See the Update FAQ for details.