Security Bulletin
Microsoft Security Bulletin MS06-070 - Critical
Vulnerability in Workstation Service Could Allow Remote Code Execution (924270)
Published: November 14, 2006
Version: 1.1
Summary
Who Should Read this Document: Customers who use Microsoft Windows
Impact of Vulnerability: Remote Code Execution
Maximum Severity Rating: Critical
Recommendation: Customers should apply the update immediately
Tested Software and Security Update Download Locations:
Affected Software:
- Microsoft Windows 2000 Service Pack 4 — Download the update
- Microsoft Windows XP Service Pack 2 — Download the update
Non-Affected Software:
- Microsoft Windows XP Professional x64 Edition
- Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1
- Microsoft Windows Server 2003 for Itanium-based Systems and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems
- Microsoft Windows Server 2003 x64 Edition
- Windows Vista
The software in this list has been tested to determine whether the versions are affected. Other versions either no longer include security update support or may not be affected. To determine the support life cycle for your product and version, visit the Microsoft Support Lifecycle Web site.
General Information
Executive Summary
Executive Summary:
This update resolves a newly discovered, privately reported, vulnerability. The vulnerability is documented in the "Vulnerability Details" section of this bulletin.
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.
We recommend that customers apply the update immediately.
Severity Ratings and Vulnerability Identifiers:
| Vulnerability Identifiers | Impact of Vulnerability | Windows 2000 Service Pack 4 | Windows XP Service Pack 2 |
|---|---|---|---|
| Workstation Service Memory Corruption Vulnerability - CVE-2006-4691 | Remote Code Execution | Critical | Low |
This assessment is based on the types of systems that are affected by the vulnerability, their typical deployment patterns, and the effect that exploiting the vulnerability would have on them.
Frequently Asked Questions (FAQ) Related to This Security Update
What updates does this release replace?
This security update replaces several prior security updates. The security bulletin IDs and affected operating systems are listed in the following table.
| Bulletin ID | Windows 2000 Service Pack 4 | Windows XP Service Pack 2 | Windows Server 2003 | Windows Server 2003 Service Pack 1 |
|---|---|---|---|---|
| MS03-049 | Replaced | Not Applicable | Not Applicable | Not Applicable |
| MS06-040 | Replaced\ | Replaced\ | Not Applicable | Not Applicable |
Extended security update support for Microsoft Windows XP Home Edition Service Pack 1 or Service Pack 1a, Windows XP Media Center Edition 2002 Service Pack 1, Windows XP Media Center Edition 2004 Service Pack 1, Windows XP Professional Service Pack 1 or Service Pack 1a, and Windows XP Tablet PC Edition Service Pack 1 ended on October 10, 2006. I am still using one of these operating systems; what should I do?
Windows XP (all versions) Service Pack 1 has reached the end of its support life cycle. It should be a priority for customers who have these operating system versions to migrate to supported versions to prevent potential exposure to vulnerabilities. For more information about the Windows Product Lifecycle, visit the following Microsoft Support Lifecycle Web site. For more information about the extended security update support period for these operating system versions, visit the Microsoft Product Support Services Web site.
Extended security update support for Microsoft Windows 98, Windows 98 Second Edition, or Windows Millennium Edition ended on July 11, 2006. I am still using one of these operating systems; what should I do?
Windows 98, Windows 98 Second Edition, and Windows Millennium Edition have reached the end of their support life cycles. It should be a priority for customers who have these operating system versions to migrate to supported versions to prevent potential exposure to vulnerabilities. For more information about the Windows Product Lifecycle, visit the following Microsoft Support Lifecycle Web site. For more information about the extended security update support period for these operating system versions, visit the Microsoft Product Support Services Web site.
Extended security update support for Microsoft Windows NT Workstation 4.0 Service Pack 6a and Windows 2000 Service Pack 2 ended on June 30, 2004. Extended security update support for Microsoft Windows NT Server 4.0 Service Pack 6a ended on December 31, 2004. Extended security update support for Microsoft Windows 2000 Service Pack 3 ended on June 30, 2005. I am still using one of these operating systems; what should I do?
Windows NT Workstation 4.0 Service Pack 6a, Windows NT Server 4.0 Service Pack 6a, Windows 2000 Service Pack 2, and Windows 2000 Service Pack 3 have reached the end of their support life cycles. It should be a priority for customers who have these operating system versions to migrate to supported versions to prevent potential exposure to vulnerabilities. For more information about the Windows Product Lifecycle, visit the following Microsoft Support Lifecycle Web site. For more information about the extended security update support period for these operating system versions, visit the Microsoft Product Support Services Web site.
Customers who require custom support for these products 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 the Microsoft Worldwide Information Web site, 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.
Can I use the Microsoft Baseline Security Analyzer (MBSA) to determine whether this update is required?
The following table provides the MBSA detection summary for this security update.
| Product | MBSA 1.2.1 | MBSA 2.0 |
|---|---|---|
| Microsoft Windows 2000 Service Pack 4 | Yes | Yes |
| Microsoft Windows XP Service Pack 2 | Yes | Yes |
For more information about MBSA, visit the MBSA Web site. For more information about the programs that Microsoft Update and MBSA 2.0 currently do not detect, see Microsoft Knowledge Base Article 895660.
For more detailed information, see Microsoft Knowledge Base Article 910723.
Can I use Systems Management Server (SMS) to determine whether this update is required?
The following table provides the SMS detection summary for this security update.
| Product | SMS 2.0 | SMS 2003 |
|---|---|---|
| Microsoft Windows 2000 Service Pack 4 | Yes | Yes |
| Microsoft Windows XP Service Pack 2 | Yes | Yes |
SMS 2.0 and SMS 2003 Software Update Services (SUS) Feature Pack can use MBSA 1.2.1 for detection and therefore have the same limitation that is listed earlier in this bulletin related to programs that MBSA 1.2.1 does not detect.
For more information about SMS, visit the SMS Web site.
For more detailed information, see Microsoft Knowledge Base Article 910723.
Vulnerability Details
Workstation Service Memory Corruption Vulnerability - CVE-2006-4691:
A remote code execution vulnerability exists in the Workstation service that could allow an attacker who successfully exploited this vulnerability to take complete control of the affected system.
Mitigating Factors for Workstation Service Memory Corruption Vulnerability - CVE-2006-4691:
- Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed.
- For Windows Server 2003 the affected component is not vulnerable.
- On Windows XP Service Pack 2 the attack could only be successfully performed by a user with Administrator privileges.
Workarounds for Workstation Service Memory Corruption Vulnerability - CVE-2006-4691:
Microsoft has tested the following workarounds. Although these workarounds will not correct the underlying vulnerability, they help block known attack vectors. When a workaround reduces functionality, it is identified in the following section.
Block TCP ports 139 and 445 at the firewall:
These ports are used to initiate a connection with the affected component. Blocking TCP ports 139 and 445 at the firewall will help protect systems that are behind that firewall from attempts to exploit this vulnerability. We recommend that you block all unsolicited inbound communication from the Internet to help prevent attacks that may use other ports. For more information about ports, visit the following Web site.Impact of Workaround: Several Windows services use the affected ports. Blocking connectivity to the ports may cause various applications or services to not function. Some of the applications or services that could be impacted are listed below.
Applications that uses SMB (CIFS)
Applications that uses mailslots or named pipes (RPC over SMB)
Server (File and Print Sharing)
Group Policy
Net Logon
Distributed File System (DFS)
Terminal Server Licensing
Print Spooler
Computer Browser
Remote Procedure Call Locator
Fax Service
Indexing Service
Performance Logs and Alerts
Systems Management Server
License Logging ServiceTo help protect from network-based attempts to exploit this vulnerability, use a personal firewall, such as the Windows Firewall, which is included with Windows XP.
By default, the Windows Firewall feature in Windows XP helps protect your Internet connection by blocking unsolicited incoming traffic. We recommend that you block all unsolicited incoming communication from the Internet.To enable the Windows Firewall feature by using the Network Setup Wizard, follow these steps:
- Click Start, and then click Control Panel.
- Double-click Network Connections and then click Change Windows Firewall settings.
- On the General tab, ensure that the On (recommended) value is selected. This will enable the Windows Firewall.
- Once the Windows Firewall is enabled, select Don’t allow exceptions to prohibit all incoming traffic.
- if you want to enable certain programs and services to communicate through the firewall, de-select Don’t allow exceptions and click the Exceptions tab. On the Exception tab, select the programs, protocols, and services you want to enable.
To help protect from network-based attempts to exploit this vulnerability, enable advanced TCP/IP filtering on systems that support this feature.
You can enable advanced TCP/IP filtering to block all unsolicited inbound traffic. For more information about how to configure TCP/IP filtering, see Microsoft Knowledge Base Article 309798.To help protect from network-based attempts to exploit this vulnerability, block the affected ports by using IPSec on the affected systems.
Use Internet Protocol security (IPSec) to help protect network communications. Detailed information about IPSec and about how to apply filters is available in Microsoft Knowledge Base Article 313190 and Microsoft Knowledge Base Article 813878.
FAQ for Workstation Service Memory Corruption Vulnerability - CVE-2006-4691:
What is the scope of the vulnerability?
This is a remote code execution vulnerability. An attacker who successfully exploited this vulnerability could remotely 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.
What causes the vulnerability?
An unchecked buffer in the Workstation service.
What is the Workstation service?
Both local file system requests and remote file or print network requests are routed through the Workstation service. This service determines where the resource is located and then routes the request to the local file system or to the networking components. When the Workstation service is stopped, all requests are assumed to be local requests.
What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could take complete control of the affected system.
Who could exploit the vulnerability?
On Windows 2000 Service Pack 4 any anonymous user who could deliver a specially crafted message to the affected system could try to exploit this vulnerability. On Windows XP Service Pack 2 the attack could only be successfully performed by a user with Administrator privileges.
How could an attacker exploit the vulnerability?
An attacker could attempt to exploit this vulnerability by sending a valid domain join request to a Windows 2000 system, causing that system to communicate with a malicious server acting as a valid or resolvable domain controller.
What systems are primarily at risk from the vulnerability?
Systems running Windows 2000 Service Pack 4 and Windows XP Service Pack 2 are primarily at risk from this vulnerability.
Could the vulnerability be exploited over the Internet?
Yes. An attacker could try to exploit this vulnerability over the Internet. Firewall best practices and standard default firewall configurations can help protect against attacks that originate from the Internet. Microsoft has provided information about how you can help protect your PC. End users can visit the Protect Your PC Web site. IT professionals can visit the Security Guidance Center Web site.
What does the update do?
The update removes the vulnerability by modifying the way that the Workstation service validates the length of a message before it passes the message to the allocated buffer.
When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft received information about this vulnerability through responsible disclosure.
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.
Security Update Information
Affected Software:
For information about the specific security update for your affected software, click the appropriate link:
Windows 2000 (all versions)
Prerequisites
For Windows 2000, this security update requires Service Pack 4 (SP4). For Small Business Server 2000, this security update requires Small Business Server 2000 Service Pack 1a (SP1a) or Small Business Server 2000 running with Windows 2000 Server Service Pack 4 (SP4).
The software that is listed has been tested to determine whether the versions are affected. Other versions either no longer include security update support or may not be affected. To determine the support life cycle for your product and version, visit the Microsoft Support Lifecycle Web site.
For more information about how to obtain the latest service pack, see Microsoft Knowledge Base Article 260910.
Inclusion in Future Service Packs
The update for this issue may be included in a future Update Rollup.
Installation Information
This security update supports the following setup 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 forces other applications to close at shutdown without saving open files first. |
| /warnrestart[:x] | Displays 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 | Display 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 uninstallation. |
| /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. For more information about the Update.exe 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.
Deployment Information
To install the security update without any user intervention, use the following command at a command prompt for Windows 2000 Service Pack 4:
Windows2000-KB924270-x86-enu /quiet
Note Use of the /quiet switch will suppress all messages. This includes suppressing failure messages. Administrators should use one of the supported methods to verify the installation was successful when they use the /quiet switch. Administrators should also review the KB924270.log file for any failure messages when they use this switch.
To install the security update without forcing the system to restart, use the following command at a command prompt for Windows 2000 Service Pack 4:
Windows2000-KB924270-x86-enu /norestart
For more information about how to deploy this security update with Software Update Services, visit the Software Update Services Web site. For more information about how to deploy this security update using Windows Server Update Services, visit the Windows Server Update Services Web site. This security update will also be available through the Microsoft Update Web site.
Restart Requirement
You must restart your system after you apply this security update..
Removal Information
To remove this security update, use the Add or Remove Programs tool in Control Panel.
System administrators can also use the Spuninst.exe utility to remove this security update. The Spuninst.exe utility is located in the %Windir%\$NTUninstallKB924270$\Spuninst folder.
| 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 forces other applications to close at shutdown without saving open files first. |
| /warnrestart[:x] | Displays 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 | Display 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. |
File Information
The English version of this security update has the file attributes that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Windows 2000 Service Pack 4 and Small Business Server 2000:
| File Name | Version | Date | Time | Size |
|---|---|---|---|---|
| Lsasrv.dll | 5.0.2195.7108 | 16-Aug-2006 | 14:28 | 513,808 |
| Netapi32.dll | 5.0.2195.7108 | 18-Aug-2006 | 01:44 | 309,520 |
| Sp3res.dll | 5.0.2195.7087 | 03-May-2006 | 06:57 | 6,401,024 |
| Wkssvc.dll | 5.0.2195.7108 | 17-Aug-2006 | 13:14 | 98,064 |
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 frequently asked question, “Can I use the Microsoft Baseline Security Analyzer (MBSA) to determine whether this update is required?” in the section, Frequently Asked Questions (FAQ) Related to This Security Update, earlier in this bulletin.File Version Verification
Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.Click Start, and then click Search.
In the Search Results pane, click All files and folders under Search Companion.
In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
In the list of files, right-click a file name from the appropriate file information table, and then click Properties.
Note Depending on the version of the operating system or programs installed, some of the files that are listed in the file information table may not be installed.
On the Version tab, determine the version of the file that is installed on your computer 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 following registry key:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows 2000\SP5\KB924270\Filelist
Note This registry key may not contain a complete list of installed files. Also, this registry key may not be created correctly when an administrator or an OEM integrates or slipstreams the security update into the Windows installation source files.
Windows XP (all versions)
Prerequisites This security update requires Microsoft Windows XP Service Pack 2. For more information, see Microsoft Knowledge Base Article 322389.
Inclusion in Future Service Packs The update for this issue will be included in a future Service Pack or Update Rollup.
Installation Information
This security update supports the following setup 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 forces other applications to close at shutdown without saving open files first. |
| /warnrestart[:x] | Displays 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 | Display 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 uninstallation. |
| /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. For more information about the Update.exe installer, visit the Microsoft TechNet Web site.
Deployment Information
To install the security update without any user intervention, use the following command at a command prompt for Microsoft Windows XP:
Windowsxp-KB924270-x86-enu /quiet
Note Use of the /quiet switch will suppress all messages. This includes suppressing failure messages. Administrators should use one of the supported methods to verify the installation was successful when they use the /quiet switch. Administrators should also review the KB924270.log file for any failure messages when they use this switch.
To install the security update without forcing the system to restart, use the following command at a command prompt for Windows XP:
Windowsxp-KB924270-x86-enu /norestart
For information about how to deploy this security update by using Software Update Services, visit the Software Update Services Web site. For more information about how to deploy this security update using Windows Server Update Services, visit the Windows Server Update Services Web site. This security update will also be available through the Microsoft Update Web site.
Restart Requirement
You must restart your system after you apply this security update.
Removal Information
To remove this security update, use the Add or Remove Programs tool in Control Panel.
System administrators can also use the Spuninst.exe utility to remove this security update. The Spuninst.exe utility is located in the %Windir%\$NTUninstallKB924270$\Spuninst folder.
| 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 forces other applications to close at shutdown without saving open files first. |
| /warnrestart[:x] | Displays 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 | Display 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. |
File Information
The English version of this security update has the file attributes that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Windows XP Home Edition Service Pack 2, Windows XP Professional Service Pack 2, Windows XP Tablet PC Edition 2005, and Windows XP Media Center Edition 2005:
| File Name | Version | Date | Time | Size | Folder |
|---|---|---|---|---|---|
| Lsasrv.dll | 5.1.2600.2976 | 17-Aug-2006 | 12:28 | 721,920 | SP2GDR |
| Netapi32.dll | 5.1.2600.2976 | 17-Aug-2006 | 12:28 | 332,288 | SP2GDR |
| Wkssvc.dll | 5.1.2600.2976 | 17-Aug-2006 | 12:28 | 132,096 | SP2GDR |
| Lsasrv.dll | 5.1.2600.2976 | 17-Aug-2006 | 12:37 | 726,528 | SP2QFE |
| Netapi32.dll | 5.1.2600.2976 | 17-Aug-2006 | 12:37 | 337,408 | SP2QFE |
| Wkssvc.dll | 5.1.2600.2976 | 17-Aug-2006 | 12:37 | 132,096 | SP2QFE |
Notes When you install these security updates, 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.
For more information about the Update.exe 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.
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 frequently asked question, “Can I use the Microsoft Baseline Security Analyzer (MBSA) to determine whether this update is required?” in the section, Frequently Asked Questions (FAQ) Related to This Security Update, earlier in this bulletin.File Version Verification
Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.Click Start, and then click Search.
In the Search Results pane, click All files and folders under Search Companion.
In the All or part of the file name box, type a file name from the appropriate file information table, and then click Search.
In the list of files, right-click a file name from the appropriate file information table, and then click Properties.
Note Depending on the version of the operating system or programs installed, some of the files that are listed in the file information table may not be installed.
On the Version tab, determine the version of the file that is installed on your computer 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 following registry keys.Windows XP Tablet PC Edition, Windows XP Media Center Edition, Windows XP Home Edition Service Pack 2, Windows XP Professional Service Pack 2, Windows XP Tablet PC Edition 2005, and Windows XP Media Center Edition 2005:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP3\KB924270\Filelist
Note These registry keys may not contain a complete list of installed files. Also, these registry keys may not be created correctly if an administrator or an OEM integrates or slipstreams the security update into the Windows installation source files.
Other Information
Acknowledgments
Microsoft thanks the following for working with us to help protect customers:
- eEye for reporting the Workstation Service Memory Corruption Vulnerability (CVE-2006-4691).
Obtaining Other Security Updates:
Updates for other security issues are available at the following locations:
- Security updates are available at the Microsoft Download Center. You can find them most easily by doing a keyword search for "security_patch."
- Updates for consumer platforms are available at the Microsoft Update Web site.
Support:
- Customers in the U.S. and Canada can receive technical support from Microsoft Product Support Services 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.
Security Resources:
- The Microsoft TechNet Security Web site provides additional information about security in Microsoft products.
- TechNet Update Management Center
- Microsoft Software Update Services
- Microsoft Windows Server Update Services
- Microsoft Baseline Security Analyzer (MBSA)
- Windows Update
- Microsoft Update
- Windows Update Catalog: For more information about the Windows Update Catalog, see Microsoft Knowledge Base Article 323166.
- Office Update
Software Update Services:
By using Microsoft Software Update Services (SUS), administrators can quickly and reliably deploy the latest critical updates and security updates to Windows 2000 and Windows Server 2003-based servers, and to desktop systems that are running Windows 2000 Professional or Windows XP Professional.
For more information about how to deploy security updates by using Software Update Services, visit the Software Update Services Web site.
Windows Server Update Services:
By using Windows Server Update Services (WSUS), administrators can quickly and reliably 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 onto Windows 2000 and later operating systems.
For more information about how to deploy security updates using Windows Server Update Services, visit the Windows Server Update Services Web site.
Systems Management Server:
Microsoft Systems Management Server (SMS) delivers a highly configurable enterprise solution for managing updates. By using SMS, administrators can identify Windows-based systems that require security updates and can perform controlled deployment of these updates throughout the enterprise with minimal disruption to end users. For more information about how administrators can use SMS 2003 to deploy security updates, visit the SMS 2003 Security Patch Management Web site. SMS 2.0 users can also use Software Updates Service Feature Pack to help deploy security updates. For information about SMS, visit the SMS Web site.
Note SMS uses the Microsoft Baseline Security Analyzer, the Microsoft Office Detection Tool, and the Enterprise Update Scan Tool to provide broad support for security bulletin update detection and deployment. Some software updates may not be detected by these tools. Administrators can use the inventory capabilities of the SMS in these cases to target updates to specific systems. For more information about this procedure, visit the following Web site. Some security updates require administrative rights following a restart of the system. Administrators can use the Elevated Rights Deployment Tool (available in the SMS 2003 Administration Feature Pack and in the SMS 2.0 Administration Feature Pack) to install these updates.
Disclaimer:
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Revisions:
- V1.0 (November 14, 2006): Bulletin published.
- V1.1 (November 16, 2006): Bulletin updated to clarify how an attacker could exploit the vulnerability in the “FAQ for Workstation Service Memory Corruption Vulnerability - CVE-2006-4691” section.
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