Security Bulletin

Microsoft Security Bulletin MS08-064 - Important

Vulnerability in Virtual Address Descriptor Manipulation Could Allow Elevation of Privilege (956841)

Published: October 14, 2008 | Updated: October 15, 2008

Version: 1.1

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Virtual Address Descriptor. The vulnerability could allow elevation of privilege if a user runs a specially crafted application. An authenticated attacker who successfully exploited this vulnerability could gain elevation of privilege on an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full administrative rights.

This security update is rated Important for all supported editions of Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by modifying the way that Virtual Address Descriptor handles memory allocation variables. 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. Microsoft recommends that customers apply the update at the earliest opportunity.

Known Issues. None

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 System	Maximum Security Impact	Aggregate Severity Rating	Bulletins Replaced by this Update
Windows XP Service Pack 2	Elevation of Privilege	Important	MS07-022
Windows XP Service Pack 3	Elevation of Privilege	Important	None
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2	Elevation of Privilege	Important	Microsoft Security Advisory (932596)
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2	Elevation of Privilege	Important	MS07-022
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2	Elevation of Privilege	Important	Microsoft Security Advisory (932596)
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems	Elevation of Privilege	Important	None
Windows Vista	Elevation of Privilege	Important	MS07-066
Windows Vista Service Pack 1	Elevation of Privilege	Important	None
Windows Vista x64 Edition	Elevation of Privilege	Important	MS07-066
Windows Vista x64 Edition Service Pack 1	Elevation of Privilege	Important	None
Windows Server 2008 for 32-bit Systems*	Elevation of Privilege	Important	None
Windows Server 2008 for x64-based Systems*	Elevation of Privilege	Important	None
Windows Server 2008 for Itanium-based Systems	Elevation of Privilege	Important	None

*Windows Server 2008 server core installation affected. For supported editions of Windows Server 2008, this update applies, with the same severity rating, whether or not 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

Operating System
Microsoft Windows 2000 Service Pack 4

Frequently Asked Questions (FAQ) Related to This Security Update

Where are the file information details?
The file information details can be found in Microsoft Knowledge Base Article 956841.

I am using an older release of the software discussed in this security bulletin. What should I do?
The affected software listed in this bulletin have been tested to determine which releases are affected. Other releases are past their support life cycle. To determine the support life cycle for your software release, visit Microsoft Support Lifecycle.

It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. For more information about the Windows Product Lifecycle, visit Microsoft Support Lifecycle. For more information about the extended security update support period for these software versions or editions, visit Microsoft Product Support Services.

Customers who require custom support for older releases must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, visit Microsoft Worldwide Information, select the country, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Windows Operating System Product Support Lifecycle FAQ.

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Vulnerability Severity Rating and Maximum Security Impact by Affected Software

Affected Software	Virtual Address Descriptor Elevation of Privilege Vulnerability - CVE-2008-4036	Aggregate Severity Rating
Windows XP Service Pack 2 and Windows XP Service Pack 3	Important Elevation of Privilege	Important
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2	Important Elevation of Privilege	Important
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2	Important Elevation of Privilege	Important
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2	Important Elevation of Privilege	Important
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems	Important Elevation of Privilege	Important
Windows Vista and Windows Vista Service Pack 1	Important Elevation of Privilege	Important
Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1	Important Elevation of Privilege	Important
Windows Server 2008 for 32-bit Systems\*	Important Elevation of Privilege	Important
Windows Server 2008 for x64-based Systems\*	Important Elevation of Privilege	Important
Windows Server 2008 for Itanium-based Systems	Important Elevation of Privilege	Important

**\*Windows Server 2008 server core installation affected.** For supported editions of Windows Server 2008, this update applies, with the same severity rating, whether or not Windows Server 2008 was installed using the Server Core installation option. For more information on this installation option, see [Server Core](http://msdn.microsoft.com/en-us/library/ms723891(vs.85).aspx). Note that the Server Core installation option does not apply to certain editions of Windows Server 2008; see [Compare Server Core Installation Options](http://www.microsoft.com/windowsserver2008/en/us/compare-core-installation.aspx). Virtual Address Descriptor Elevation of Privilege Vulnerability - CVE-2008-4036 ------------------------------------------------------------------------------- An elevation of privilege vulnerability exists in the way that Memory Manager handles memory allocation and Virtual Address Descriptors (VADs). The vulnerability could allow elevation of privilege if an authenticated attacker runs a specially crafted program on an affected system. An attacker who successfully exploited this vulnerability could gain elevation of privilege on an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full administrative rights. To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see [CVE-2008-4036](http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2008-4036). #### Mitigating Factors for Virtual Address Descriptor Elevation of Privilege Vulnerability - CVE-2008-4036 Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation: - An attacker must be authenticated in order to exploit this vulnerability. #### Workarounds for Virtual Address Descriptor Elevation of Privilege Vulnerability - CVE-2008-4036 Microsoft has not identified any workarounds for this vulnerability. #### FAQ for Virtual Address Descriptor Elevation of Privilege Vulnerability - CVE-2008-4036 **What is the scope of the vulnerability?**  This is an elevation of privilege vulnerability. An attacker who successfully exploited this vulnerability could gain elevation of privilege on an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full administrative rights. **What causes the vulnerability?**  Memory manager does not correctly handle an integer overflow when decrementing a variable, which causes a memory allocation mapping error. **What is Virtual Address Descriptor?**  VAD is a form of virtual memory to applications that allows each application to have its own private address space. For more information on VAD see MSDN articles [Virtual-memory Manager in Windows NT](http://msdn.microsoft.com/en-us/library/ms810616.aspx) and[Managing Virtual memory in Win32](http://msdn.microsoft.com/en-us/library/ms810627.aspx). **What might an attacker use the vulnerability to do?**  An attacker who successfully exploited this vulnerability could gain elevation of privilege on an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full administrative rights. **How could an attacker exploit the vulnerability?**  An authenticated attacker could run a specially crafted program which could cause an integer overflow, thus corrupting memory in such a way as to allow code execution. **What systems are primarily at risk from the vulnerability?**  Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008 are at risk from this vulnerability. **What does the update do?**  The vulnerability was caused by an integer overflow. The update removes the vulnerability by adding additional validation around VAD parameters. **When this security bulletin was issued, had this vulnerability been publicly disclosed?**  No. Microsoft received information about this vulnerability through responsible disclosure. Microsoft had not received any information to indicate that this vulnerability had been publicly disclosed when this security bulletin was originally issued. **When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?**  No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers and had not seen any examples of proof of concept code published when this security bulletin was originally issued. ### Update Information Detection and Deployment Tools and Guidance ------------------------------------------- Manage the software and security updates you need to deploy to the servers, desktop, and mobile systems in your organization. For more information see the [TechNet Update Management Center](http://go.microsoft.com/fwlink/?linkid=69903). The [Microsoft TechNet Security Web site](http://go.microsoft.com/fwlink/?linkid=21132) provides additional information about security in Microsoft products. Security updates are available from [Microsoft Update](http://go.microsoft.com/fwlink/?linkid=40747), [Windows Update](http://go.microsoft.com/fwlink/?linkid=21130), and [Office Update](http://go.microsoft.com/fwlink/?linkid=21135). Security updates are also available from the [Microsoft Download Center](http://go.microsoft.com/fwlink/?linkid=21129). You can find them most easily by doing a keyword search for "security update." Finally, security updates can be downloaded from the [Microsoft Update Catalog](http://go.microsoft.com/fwlink/?linkid=96155). The Microsoft Update Catalog provides a searchable catalog of content made available through Windows Update and Microsoft Update, including security updates, drivers and service packs. By searching using the security bulletin number (such as, “MS07-036”), you can add all of the applicable updates to your basket (including different languages for an update), and download to the folder of your choosing. For more information about the Microsoft Update Catalog, see the [Microsoft Update Catalog FAQ](http://go.microsoft.com/fwlink/?linkid=97900). **Detection and Deployment Guidance** Microsoft has provided detection and deployment guidance for this month’s security updates. This guidance will also help IT professionals understand how they can use various tools to help deploy the security update, such as Windows Update, Microsoft Update, Office Update, the Microsoft Baseline Security Analyzer (MBSA), the Office Detection Tool, Microsoft Systems Management Server (SMS), and the Extended Security Update Inventory Tool. For more information, see [Microsoft Knowledge Base Article 910723](http://support.microsoft.com/kb/910723). **Microsoft Baseline Security Analyzer** Microsoft Baseline Security Analyzer (MBSA) allows administrators to scan local and remote systems for missing security updates as well as common security misconfigurations. For more information about MBSA, visit [Microsoft Baseline Security Analyzer](http://www.microsoft.com/technet/security/tools/mbsahome.mspx). The following table provides the MBSA detection summary for this security update. | Software | MBSA 2.1 | |-------------------------------------------------------------------------------------------------------------------|----------| | Windows XP Service Pack 2 and Windows XP Service Pack 3 | Yes | | Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 | Yes | | Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 | Yes | | Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 | Yes | | Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems | Yes | | Windows Vista and Windows Vista Service Pack 1 | Yes | | Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1 | Yes | | Windows Server 2008 for 32-bit Systems | Yes | | Windows Server 2008 for x64-based Systems | Yes | | Windows Server 2008 for Itanium-based Systems | Yes | For more information about MBSA 2.1, see [MBSA 2.1 Frequently Asked Questions](http://www.microsoft.com/technet/security/tools/mbsa2/qa.mspx). **Windows Server Update Services** By using Windows Server Update Services (WSUS), administrators can deploy the latest critical updates and security updates for Windows 2000 operating systems and later, Office XP and later, Exchange Server 2003, and SQL Server 2000. For more information about how to deploy this security update using Windows Server Update Services, visit the [Windows Server Update Services Web site](http://go.microsoft.com/fwlink/?linkid=50120). **Systems Management Server** The following table provides the SMS detection and deployment summary for this security update. | Software | SMS 2.0 | SMS 2003 with SUSFP | SMS 2003 with ITMU | Configuration Manager 2007 | |-------------------------------------------------------------------------------------------------------------------|---------|---------------------|----------------------------------------------------------------------|----------------------------| | Windows XP Service Pack 2 and Windows XP Service Pack 3 | Yes | Yes | Yes | Yes | | Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 | No | No | Yes | Yes | | Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 | Yes | Yes | Yes | Yes | | Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 | No | No | Yes | Yes | | Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems | No | No | Yes | Yes | | Windows Vista and Windows Vista Service Pack 1 | No | No | See **Note for Windows** **Vista** **and Windows Server 2008** below | Yes | | Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1 | No | No | See **Note for Windows** **Vista** **and Windows Server 2008** below | Yes | | Windows Server 2008 for 32-bit Systems | No | No | See **Note for Windows** **Vista** **and Windows Server 2008** below | Yes | | Windows Server 2008 for x64-based Systems | No | No | See **Note for Windows** **Vista** **and Windows Server 2008** below | Yes | | Windows Server 2008 for Itanium-based Systems | No | No | See **Note for Windows** **Vista** **and Windows Server 2008** below | Yes | For SMS 2.0 and SMS 2003, the SMS SUS Feature Pack (SUSFP), which includes the Security Update Inventory Tool (SUIT), can be used by SMS to detect security updates. See also [Downloads for Systems Management Server 2.0](http://technet.microsoft.com/en-us/sms/bb676799.aspx). For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used by SMS to detect security updates that are offered by [Microsoft Update](http://update.microsoft.com/microsoftupdate) and that are supported by [Windows Server Update Services](http://go.microsoft.com/fwlink/?linkid=50120). For more information about the SMS 2003 ITMU, see [SMS 2003 Inventory Tool for Microsoft Updates](http://technet.microsoft.com/en-us/sms/bb676783.aspx). SMS 2003 can also use the Microsoft Office Inventory Tool to detect required updates for Microsoft Office applications. For more information about the Office Inventory Tool and other scanning tools, see [SMS 2003 Software Update Scanning Tools](http://technet.microsoft.com/en-us/sms/bb676786.aspx). See also [Downloads for Systems Management Server 2003](http://technet.microsoft.com/en-us/sms/bb676766.aspx). System Center Configuration Manager 2007 uses WSUS 3.0 for detection of updates. For more information about Configuration Manager 2007 Software Update Management, visit [System Center Configuration Manager 2007](http://technet.microsoft.com/en-us/library/bb735860.aspx). **Note for Windows** **Vista** **and Windows Server 2008** Microsoft Systems Management Server 2003 with Service Pack 3 includes support for Windows Vista and Windows Server 2008 manageability. For more information about SMS, visit the [SMS Web site](http://go.microsoft.com/fwlink/?linkid=21158). For more detailed information, see [Microsoft Knowledge Base Article 910723](http://support.microsoft.com/kb/910723): Summary list of monthly detection and deployment guidance articles. **Update Compatibility Evaluator and Application Compatibility Toolkit** Updates often write to the same files and registry settings required for your applications to run. This can trigger incompatibilities and increase the time it takes to deploy security updates. You can streamline testing and validating Windows updates against installed applications with the [Update Compatibility Evaluator](http://technet2.microsoft.com/windowsvista/en/library/4279e239-37a4-44aa-aec5-4e70fe39f9de1033.mspx?mfr=true) components included with [Application Compatibility Toolkit 5.0](https://www.microsoft.com/download/details.aspx?familyid=24da89e9-b581-47b0-b45e-492dd6da2971&displaylang=en). The Application Compatibility Toolkit (ACT) contains the necessary tools and documentation to evaluate and mitigate application compatibility issues before deploying Microsoft Windows Vista, a Windows Update, a Microsoft Security Update, or a new version of Windows Internet Explorer in your environment. Security Update Deployment -------------------------- **Affected Software** For information about the specific security update for your affected software, click the appropriate link: #### Windows XP (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs	The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention	Windows XP Service Pack 2 and Windows XP Service Pack 3: Windowsxp-kb956841-x86-enu /quiet
	Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2: WindowsServer2003.WindowsXP-kb956841-x64-enu /quiet
Installing without restarting	Windows XP Service Pack 2 and Windows XP Service Pack 3: Windowsxp-kb956841-x86-enu /norestart
	Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2: WindowsServer2003.WindowsXP-kb956841-x64-enu /norestart
Update log file	KB956841.log
Further information	See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?	Yes, you must restart your system after you apply this security update
HotPatching	Not applicable
Removal Information	Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB956841$\Spuninst folder
File Information	See Microsoft Knowledge Base Article 956841
Registry Key Verification	Windows XP Service Pack 2 and Windows XP Service Pack 3: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP4\KB956841\Filelist
	Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP Version 2003\SP3\KB956841\Filelist

Note For supported versions of Windows XP Professional x64 Edition, this security update is the same as supported versions of the Windows Server 2003 x64 Edition security update.

Deployment Information

Installing the Update

When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix.

If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see Microsoft Knowledge Base Article 824994.

For more information about the installer, visit the Microsoft TechNet Web site.

For more information about the terminology that appears in this bulletin, such as hotfix, see Microsoft Knowledge Base Article 824684.

This security update supports the following setup switches.

Supported Security Update Installation Switches

Switch	Description
**/help**	Displays the command-line options.
Setup Modes
**/passive**	Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
**/quiet**	Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
**/norestart**	Does not restart when installation has completed.
**/forcerestart**	Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
**/warnrestart\[:x\]**	Presents a dialog box with a timer warning the user that the computer will restart in *x* seconds. (The default setting is 30 seconds.) Intended for use with the **/quiet** switch or the **/passive** switch.
**/promptrestart**	Displays a dialog box prompting the local user to allow a restart.
Special Options
**/overwriteoem**	Overwrites OEM files without prompting.
**/nobackup**	Does not back up files needed for uninstall.
**/forceappsclose**	Forces other programs to close when the computer shuts down.
**/log:path**	Allows the redirection of installation log files.
**/integrate:path**	Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
**/extract\[:path\]**	Extracts files without starting the Setup program.
**/ER**	Enables extended error reporting.
**/verbose**	Enables verbose logging. During installation, creates %Windir%\\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

**Note** You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see [Microsoft Knowledge Base Article 262841](http://support.microsoft.com/kb/262841).

Removing the Update

This security update supports the following setup switches.

Supported Spuninst.exe Switches

Switch	Description
**/help**	Displays the command-line options.
Setup Modes
**/passive**	Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
**/quiet**	Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
**/norestart**	Does not restart when installation has completed
**/forcerestart**	Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
**/warnrestart\[:x\]**	Presents a dialog box with a timer warning the user that the computer will restart in *x* seconds. (The default setting is 30 seconds.) Intended for use with the **/quiet** switch or the **/passive** switch.
**/promptrestart**	Displays a dialog box prompting the local user to allow a restart.
Special Options
**/forceappsclose**	Forces other programs to close when the computer shuts down.
**/log:path**	Allows the redirection of installation log files.

**Verifying That the Update Has Been Applied**

• Microsoft Baseline Security Analyzer

  To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

• File Version Verification

  Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

  1. Click Start, and then click Search.
  2. In the Search Results pane, click All files and folders under Search Companion.
  3. In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
  4. In the list of files, right-click a file name from the appropriate file information table, and then click Properties. Note Depending on the edition of the operating system, or the programs that are installed on your system, some of the files that are listed in the file information table may not be installed.
  5. On the Version tab, determine the version of the file that is installed on your system by comparing it to the version that is documented in the appropriate file information table. Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation.

• Registry Key Verification

  You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

  These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows Server 2003 (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs	The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention	For all supported 32-bit editions of Windows Server 2003: Windowsserver2003-kb956841-x86-enu /quiet
	For all supported x64-based editions of Windows Server 2003: Windowsserver2003.WindowsXP-KB956841-x64-enu /quiet
	For all supported Itanium-based editions of Windows Server 2003: Windowsserver2003-KB956841-ia64-enu /quiet
Installing without restarting	For all supported 32-bit editions of Windows Server 2003: Windowsserver2003-kb956841-x86-enu /norestart
	For all supported x64-based editions of Windows Server 2003: Windowsserver2003.WindowsXP-KB956841-x64-enu /norestart
	For all supported Itanium-based editions of Windows Server 2003: Windowsserver2003-KB956841-ia64-enu /norestart
Update log file	KB956841.log
Further information	See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?	Yes, you must restart your system after you apply this security update
HotPatching	This security update does not support HotPatching. For more information about HotPatching, see Microsoft Knowledge Base Article 897341.
Removal Information	Use Add or Remove Programs tool in Control Panel or the Spuninst.exe utility located in the %Windir%\$NTUninstallKB956841$\Spuninst folder
File Information	See Microsoft Knowledge Base Article 956841
Registry Key Verification	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP3\KB956841\Filelist

#### Deployment Information **Installing the Update** When you install this security update, the installer checks to see if one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. If you have previously installed a hotfix to update one of these files, the installer copies the RTMQFE, SP1QFE, or SP2QFE files to your system. Otherwise, the installer copies the RTMGDR, SP1GDR, or SP2GDR files to your system. Security updates may not contain all variations of these files. For more information about this behavior, see [Microsoft Knowledge Base Article 824994](http://support.microsoft.com/kb/824994). For more information about the installer, visit the [Microsoft TechNet Web site](http://go.microsoft.com/fwlink/?linkid=38951). For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches.

Supported Security Update Installation Switches

Switch	Description
**/help**	Displays the command-line options.
Setup Modes
**/passive**	Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
**/quiet**	Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
**/norestart**	Does not restart when installation has completed.
**/forcerestart**	Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
**/warnrestart\[:x\]**	Presents a dialog box with a timer warning the user that the computer will restart in *x* seconds. (The default setting is 30 seconds.) Intended for use with the **/quiet** switch or the **/passive** switch.
**/promptrestart**	Displays a dialog box prompting the local user to allow a restart.
Special Options
**/overwriteoem**	Overwrites OEM files without prompting.
**/nobackup**	Does not back up files needed for uninstall.
**/forceappsclose**	Forces other programs to close when the computer shuts down.
**/log:path**	Allows the redirection of installation log files.
**/integrate:path**	Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
**/extract\[:path\]**	Extracts files without starting the Setup program.
**/ER**	Enables extended error reporting.
**/verbose**	Enables verbose logging. During installation, creates %Windir%\\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

**Note** You can combine these switches into one command. For backward compatibility, the security update also supports many of the setup switches that the earlier version of the Setup program uses. For more information about the supported installation switches, see [Microsoft Knowledge Base Article 262841](http://support.microsoft.com/kb/262841).

Removing the Update

This security update supports the following setup switches.

Supported Spuninst.exe Switches

Switch	Description
**/help**	Displays the command-line options.
Setup Modes
**/passive**	Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
**/quiet**	Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
**/norestart**	Does not restart when installation has completed.
**/forcerestart**	Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
**/warnrestart\[:x\]**	Presents a dialog box with a timer warning the user that the computer will restart in *x* seconds. (The default setting is 30 seconds.) Intended for use with the **/quiet** switch or the **/passive** switch.
**/promptrestart**	Displays a dialog box prompting the local user to allow a restart.
Special Options
**/forceappsclose**	Forces other programs to close when the computer shuts down.
**/log:path**	Allows the redirection of installation log files.

**Verifying that the Update Has Been Applied**

• Microsoft Baseline Security Analyzer

  To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, Detection and Deployment Tools and Guidance, earlier in this bulletin for more information.

• File Version Verification

  Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps.

  1. Click Start, and then click Search.
  2. In the Search Results pane, click All files and folders under Search Companion.
  3. In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
  4. In the list of files, right-click a file name from the appropriate file information table, and then click Properties. Note Depending on the edition of the operating system, or the programs that are installed on your system, some of the files that are listed in the file information table may not be installed.
  5. On the Version tab, determine the version of the file that is installed on your system by comparing it to the version that is documented in the appropriate file information table. Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update has been applied. Also, in certain cases, files may be renamed during installation. If the file or version information is not present, use one of the other available methods to verify update installation.

• Registry Key Verification

  You may also be able to verify the files that this security update has installed by reviewing the registry keys listed in the Reference Table in this section.

  These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly when an administrator or an OEM integrates or slipstreams this security update into the Windows installation source files.

Windows Vista (all editions)

Reference Table

The following table contains the security update information for this software. You can find additional information in the subsection, Deployment Information, in this section.

Inclusion in Future Service Packs	The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention	For all supported 32-bit editions of Windows Vista: Windows6.0-KB956841-x86 /quiet For all supported x64-based editions of Windows Vista: Windows6.0-KB956841-x64 /quiet
Installing without restarting	For all supported 32-bit editions of Windows Vista: Windows6.0-KB956841-x86 /quiet /norestart For all supported x64-based editions of Windows Vista: Windows6.0-KB956841-x64 /quiet /norestart
Further information	See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?	Yes, you must restart your system after you apply this security update
HotPatching	Not applicable.
Removal Information	WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File Information	See Microsoft Knowledge Base Article 956841
Registry Key Verification	Note A registry key does not exist to validate the presence of this update.

#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |-------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h, /help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | **Note** For more information about the wusa.exe installer, see [Microsoft Knowledge Base Article 934307](http://support.microsoft.com/kb/934307). **Verifying That the Update Has Been Applied** - **Microsoft Baseline Security Analyzer** To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, **Detection and Deployment Tools and Guidance**, earlier in this bulletin for more information. - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in **Start Search**. 2. When the file appears under **Programs**, right-click on the file name and click **Properties**. 3. Under the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. 4. You may also click on the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. 5. Finally, you may also click on the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. #### Windows Server 2008 (all editions) **Reference Table** The following table contains the security update information for this software. You can find additional information in the subsection, **Deployment Information**, in this section.

Inclusion in Future Service Packs	The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention	For all supported 32-bit editions of Windows Server 2008: Windows6.0-KB956841-x86 /quiet For all supported x64-based editions of Windows Server 2008: Windows6.0-KB956841-x64 /quiet For all supported Itanium-based editions of Windows Server 2008: Windows6.0-KB956841-ia64 /quiet
Installing without restarting	For all supported 32-bit editions of Windows Server 2008: Windows6.0-KB956841-x86 /quiet /norestart For all supported x64-based editions of Windows Server 2008: Windows6.0-KB956841-x64 /quiet /norestart For all supported Itanium-based editions of Windows Server 2008: Windows6.0-KB956841-ia64 /quiet /norestart
Further information	See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?	Yes, you must restart your system after you apply this security update
HotPatching	Not applicable.
Removal Information	WUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File Information	See Microsoft Knowledge Base Article 956841
Registry Key Verification	Note A registry key does not exist to validate the presence of this update.

#### Deployment Information **Installing the Update** When you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this bulletin, such as *hotfix*, see [Microsoft Knowledge Base Article 824684](http://support.microsoft.com/kb/824684). This security update supports the following setup switches. | Switch | Description | |-------------------|--------------------------------------------------------------------------------------------------------------------------------------------| | **/?, /h, /help** | Displays help on supported switches. | | **/quiet** | Suppresses the display of status or error messages. | | **/norestart** | When combined with **/quiet**, the system will not be restarted after installation even if a restart is required to complete installation. | **Note** For more information about the wusa.exe installer, see [Microsoft Knowledge Base Article 934307](http://support.microsoft.com/kb/934307). **Verifying That the Update Has Been Applied** - **Microsoft Baseline Security Analyzer** To verify that a security update has been applied to an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. See the section, **Detection and Deployment Tools and Guidance**, earlier in this bulletin for more information. - **File Version Verification** Because there are several editions of Microsoft Windows, the following steps may be different on your system. If they are, see your product documentation to complete these steps. 1. Click **Start** and then enter an update file name in **Start Search**. 2. When the file appears under **Programs**, right-click on the file name and click **Properties**. 3. Under the **General** tab, compare the file size with the file information tables provided in the bulletin KB article. 4. You may also click on the **Details** tab and compare information, such as file version and date modified, with the file information tables provided in the bulletin KB article. 5. Finally, you may also click on the **Previous Versions** tab and compare file information for the previous version of the file with the file information for the new, or updated, version of the file. ### Other Information #### Acknowledgments Microsoft [thanks](http://go.microsoft.com/fwlink/?linkid=21127) the following for working with us to help protect customers: - Alex Ionescu () for reporting the Virtual Address Descriptor Elevation of Privilege Vulnerability (CVE-2008-4036) #### Support - Customers in the U.S. and Canada can receive technical support from [Microsoft Product Support Services](http://go.microsoft.com/fwlink/?linkid=21131) at 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. - 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](http://go.microsoft.com/fwlink/?linkid=21155). #### 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 14, 2008): Bulletin published. - V1.1 (October 15, 2008): Corrected the link to a reference MSDN article in **FAQ for Virtual Address Descriptor Elevation of Privilege Vulnerability - CVE-2008-4036**. *Built at 2014-04-18T13:49:36Z-07:00*