Microsoft Security Bulletin MS11-080 - Important
Vulnerability in Ancillary Function Driver Could Allow Elevation of Privilege (2592799)
This security update resolves a privately reported vulnerability in the Microsoft Windows Ancillary Function Driver (AFD). The vulnerability could allow elevation of privilege if an attacker logs on to a user's system and runs a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit the vulnerability.
This security update is rated Important for all supported editions of Windows XP and Windows Server 2003. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerability by correcting the way that the Ancillary Function Driver (AFD) validates input before passing the input from user-mode to the Windows kernel. For more information about the vulnerability, 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 at the earliest opportunity 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. None
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.
|Operating System||Maximum Security Impact||Aggregate Severity Rating||Bulletins Replaced by this Update|
|Windows XP Service Pack 3||Elevation of Privilege||Important||MS11-046|
|Windows XP Professional x64 Edition Service Pack 2||Elevation of Privilege||Important||MS11-046|
|Windows Server 2003 Service Pack 2||Elevation of Privilege||Important||MS11-046|
|Windows Server 2003 x64 Edition Service Pack 2||Elevation of Privilege||Important||MS11-046|
|Windows Server 2003 with SP2 for Itanium-based Systems||Elevation of Privilege||Important||MS11-046|
|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|
Microsoft thanks the following for working with us to help protect customers:
- Bo Zhou of National University of Defense Technology for reporting the Ancillary Function Driver Elevation of Privilege Vulnerability (CVE-2011-2005)
- 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.
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- V1.0 (October 11, 2011): Bulletin published.