SecurityvulnsSECURITYVULNS:DOC:6975Microsoft Security Bulletin MS04-030 Vulnerability in WebDAV XML Message Handler Could Lead to a Denial of Service (824151)
Microsoft Security Bulletin MS04-030
Vulnerability in WebDAV XML Message Handler Could Lead to a Denial of Service (824151)
Issued: October 12, 2004
Version: 1.0
Summary
Who should read this document: Customers who use Microsoft® Windows®
Impact of Vulnerability: Denial of Service
Maximum Severity Rating: Important
Recommendation: Customers should install the update at the earliest opportunity.
Security Update Replacement: None
Caveats: This update contains a functionality change that may affect some applications. The affected applications issue valid WebDAV requests that have many XML attributes. For more information, see “Does this update contain any other changes to functionality?” under “Frequently asked questions (FAQ) related to this security update.”
Tested Software and Security Update Download Locations:
Affected Software:
• Microsoft Windows 2000 Service Pack 3 and Microsoft Windows 2000 Service Pack 4 – Download the update
• Microsoft Windows XP and Microsoft Windows XP Service Pack 1 – Download the update
• Microsoft Windows XP 64-Bit Edition Service Pack 1 – Download the update
• Microsoft Windows XP 64-Bit Edition Version 2003 – Download the update
• Microsoft Windows Server™ 2003 – Download the update
• Microsoft Windows Server 2003 64-Bit Edition – Download the update
Non-Affected Software:
• Microsoft Windows XP Service Pack 2
• Microsoft Windows NT Server 4.0 Service Pack 6
• Microsoft Windows NT Server 4.0 Terminal Server Edition Service Pack 6
• Microsoft Windows 98, Microsoft Windows 98 Second Edition (SE), and Microsoft Windows Millennium Edition (Me)
Affected Components:
• Internet Information Services 5.0
• Internet Information Services 5.1
• Internet Information Services 6.0
Non-Affected Components:
• Internet Information Server 4.0
The software in this list has been tested to determine if the versions are affected. Other versions either no longer include security update support or may not be affected. To determine the support lifecycle for your product and version, visit the Microsoft Support Lifecycle Web site.
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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 cause WebDAV to consume all available memory and CPU time on an affected server. This behavior could cause a denial of service. The IIS service would have to be restarted to restore functionality.
We recommend that customers consider applying the security update.
Severity Ratings and Vulnerability Identifiers:
Vulnerability Identifiers Impact of Vulnerability Windows 2000 Windows XP Windows Server 2003
WebDAV Vulnerability - CAN-2003-0718
Denial of Service
Important
Moderate
Moderate
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.
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Frequently asked questions (FAQ) related to this security update
Does this update contain any other changes to functionality?
Yes. In addition to the changes that are listed in the Vulnerability Details section of this bulletin the update requires that new limits be applied to the XML documents that WebDAV accepts. Because of this change, valid requests that violate these new limits will be returned as failed requests to the client. You can configure these new limits by using metabase entries. If an application requires documents that would otherwise be rejected, you can adjust the metabase entries to support the required content. The new metabase configurations are documented in Microsoft Knowledge Base article 824151.
Is there anything else about this update that I need to be aware of?
Yes. This update package includes a full upgrade to MSXML 3.0 Service Pack 5. This upgrade was necessary to insure proper functionality after you apply the security update. To minimize the deployment impact, we have included the upgrade in the same package as the security update.
MSXML versions are side-by-side so different major versions of MSXML will not be affected. Some programs may now default to using MSXML 3.0 instead of those other major versions of MSXML especially if no version of MSXML 3.0 was previously installed.
MSXML 3.0 is always present on Windows XP and Windows 2003 systems.
I am still using Microsoft Windows 2000 Service Pack 2, but extended security update support ended on June 30, 2004. What should I do?
Windows 2000 Service Pack 2 has reached the end of its life cycle as previously documented, and Microsoft extended this support to June 30, 2004
It should be a priority for customers who have this operating system version to migrate to a supported version to prevent potential exposure to vulnerabilities. For more information about the Windows Product Life Cycle, visit the 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.
I'm still using Windows XP, but extended security update support ended on September 30th, 2004. However, this bulletin has a security update for this operating system version. Why is that?
The original version of Windows XP, commonly referred to as Windows XP Gold or Windows XP Release to Manufacturing (RTM) version, reached the end of its extended security update support life cycle on September 30th, 2004. However, the end-of-life occurred very recently. In this case, the majority of the steps that are required to address this vulnerability were completed before this date. Therefore, we have decided to release a security update for this operating system version as part of this security bulletin. We do not anticipate doing this for future vulnerabilities affecting this operating system version, but we reserve the right to produce updates and to make these updates available when necessary. It should be a priority for customers who have this operating system version to migrate to supported operating system versions to prevent potential exposure to vulnerabilities. For more information about the Windows Service Pack Product Life Cycle, visit the Microsoft Support Lifecycle Web site. For more information about the Windows Product Life Cycle, visit the Microsoft Support Lifecycle Web site.
For more information, see the Windows Operating System FAQ.
Can I use the Microsoft Baseline Security Analyzer (MBSA) to determine if this update is required?
Yes. MBSA will determine if this update is required. For more information about MBSA, visit the MBSA Web site.
It is important to note that, with the inclusion of MSXML 3.0 Service Pack 5 in this update, MBSA will detect both the update that you need for IIS and the need for MSXML 3.0 Service Pack 5, and will report them under separate nodes.
Note After April 20, 2004, the Mssecure.xml file that is used by MBSA 1.1.1 and earlier versions is no longer being updated with new security bulletin data. Therefore, scans that are performed after that date with MBSA 1.1.1 or earlier will be incomplete. All users should upgrade to MBSA 1.2 because it provides more accurate security update detection and supports additional products. Users can download MBSA 1.2 from the MBSA Web site. For more information about MBSA support, visit the Microsoft Baseline Security Analyzer 1.2 Q&A Web site.
Can I use Systems Management Server (SMS) to determine if this update is required?
Yes. SMS can help detect and deploy this security update. For information about SMS, visit the SMS Web site.
You can deploy this update using the Inventory and Software Distribution feature of SMS.
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Vulnerability Details
WebDAV Vulnerability - CAN-2003-0718:
A denial of service vulnerability exists that could allow an attacker to send a specially crafted WebDAV request to a server that is running IIS and WebDAV. An attacker could cause WebDAV to consume all available memory and CPU time on an affected server. The IIS service would have to be restarted to restore functionality.
Mitigating Factors for WebDAV Vulnerability - CAN-2003-0718:
• The vulnerability can only be exploited remotely if an attacker can establish a Web session with an affected server.
• By default, Windows XP and Windows Server 2003, except for Windows Server 2003 Web Server Edition, do not install IIS.
• IIS 5.0, which is included as part of Windows 2000, is the only version that enables WebDAV by default
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Workarounds for WebDAV Vulnerability - CAN-2003-0718:
Microsoft has tested the following workarounds. While these workarounds will not correct the underlying vulnerability, they help block known attack vectors. When a workaround reduces functionality, it is identified below.
• Disable WebDAV on IIS 5.0 if it is not needed.
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FAQ for WebDAV Vulnerability - CAN-2003-0718:
What is the scope of the vulnerability? This is a denial of service vulnerability. An attacker who successfully exploited this vulnerability could cause WebDAV to consume all available memory and CPU time on an affected server. The IIS service would have to be restarted to restore functionality.
What causes the vulnerability?
WebDAV does not limit the number of attributes that can be specified per XML-element in WebDAV requests.
Why does this vulnerability require an upgrade to MSXML 3.0 Service Pack 5, which is included in this security update?
The Microsoft XML Parser is a core operating system component that applications use to process XML documents. This component is used by WebDAV and by third-party applications. This update is required to allow WebDAV to limit the number of attributes that it can try to process on submitted documents.
Do I need to install MSXML 3.0 Service Pack 5 separately?
No. The update package includes both the update for WebDAV and the upgrade files for MSXML 3.0 to upgrade your installation to Service Pack 5.
What is WebDAV?
WebDAV is an industry standard extension to the HTTP specification. The “DAV” in “WebDAV” stands for “distributed authoring and versioning.” WebDAV adds a capability for authorized users to remotely add and manage content on a Web server. By default, WebDAV is enabled when IIS is enabled on Windows 2000. By default, WebDAV is not installed on IIS 5.1 or on IIS 6.0.
What is wrong with the way that WebDAV handles HTTP requests?
Before the recent update of the XML Parser, MSXML 3.0, WebDAV, or other third-party applications that use the Microsoft XML Parser, could not limit the number of attributes that the Microsoft XML Parser would try to process on submitted documents.
What might an attacker use the vulnerability to do?
This is a denial of service vulnerability. An attacker could cause a disruption of normal services. Restarting the affected service restores normal functionality to the server. However, the service remains susceptible to a new denial of service attack until the update is applied.
Who could exploit the vulnerability?
Any user who could deliver a WebDAV request to an affected Web server could exploit the vulnerability. Because WebDAV requests travel over the same port as HTTP (typically port 80), an attacker who could establish a connection to an affected Web server could try to exploit the vulnerability
How could an attacker exploit the vulnerability?
To exploit this vulnerability, an attacker would have to send a specially-crafted HTTP messages to an affected Web site that could increase the CPU utilization on the IIS server to 100% while IIS was processing the message. The more XML attributes contained per XML element in the XML message, the longer the IIS server would take to process the XML message. This could cause a denial of service while IIS is processing the messages and the service would have to be restarted to restore functionality to the server.
What systems are primarily at risk from the vulnerability?
Servers that are running both IIS and WebDAV services are primarily at risk from this vulnerability.
Could the vulnerability be exploited over the Internet?
Yes. An attacker may be able 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 on 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 updating WebDAV to use the new XML parser properties to limit the number of XML attributes per element in the XML documents it accepts in WebDAV-based requests.
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 indicating that this vulnerability had been publicly disclosed when this security bulletin was originally issued.
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Security Update Information
Installation Platforms and Prerequisites:
For information about the specific security update for your platform, click the appropriate link:
Windows Server 2003 (all versions)
Prerequisites
This security update requires a release version of Windows Server 2003.
Inclusion in Future Service Packs:
The update for this issue will be included in Windows Server 2003 Service Pack 1.
Installation Information
This security update supports the following setup switches:
/help Displays the command line options
Setup Modes
/quiet Quiet mode (no user interaction or display)
/passive Unattended mode (progress bar only)
/uninstall Uninstalls the package
Restart Options
/norestart Do not restart when installation is complete
/forcerestart Restart after installation
Special Options
/l Lists installed Windows hotfixes or update packages
/o Overwrite OEM files without prompting
/n Do not backup files needed for uninstall
/f Force other programs to close when the computer shuts down
/extract Extracts files without starting setup
Note You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the previous version of the setup utility uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article about the supported installation switches, see Microsoft Knowledge Base Article 262841.
Deployment Information
To install the security update without any user intervention, use the following command at a command prompt for Windows Server 2003:
Windowsserver2003-kb824151-x86-enu /passive /quiet
To install the security update without forcing the system to restart, use the following command at a command prompt for Windows Server 2003:
Windowsserver2003-kb824151-x86-enu /norestart
For information about how to deploy this security update with Software Update Services, visit the Software Update Services Web site.
Restart Requirement
You must restart your system after you apply this security update.
Removal Information
To remove this 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%\$NTUninstallKB824151$\Spuninst folder. The Spuninst.exe utility supports the following setup switches:
/?: Show the list of installation switches.
/u: Use unattended mode.
/f: Force other programs to quit when the computer shuts down.
/z: Do not restart when the installation is complete.
/q: Use Quiet mode (no user interaction).
File Information
The English version of this update has the file attributes (or later) 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 Server 2003 Enterprise Edition, Windows Server 2003 Standard Edition, Windows Server 2003 Web Edition, and Windows Server 2003 Datacenter Edition:
Date Time Version Size File name Folder
22-Sep-2004 23:23 6.0.3790.212 273,408 Adsiis.dll Rtmgdr
22-Sep-2004 23:23 6.0.3790.212 225,792 Httpext.dll Rtmgdr
22-Sep-2004 23:23 8.50.2162.0 1,380,352 Msxml3.dll Rtmgdr
22-Sep-2004 22:54 6.0.3790.215 274,432 Adsiis.dll Rtmqfe
22-Sep-2004 22:54 6.0.3790.212 225,792 Httpext.dll Rtmqfe
22-Sep-2004 22:54 8.50.2162.0 1,380,352 Msxml3.dll Rtmqfe
Windows Server 2003 64-Bit Enterprise Edition and Windows Server 2003 64-Bit Datacenter Edition:
Date Time Version Size File name Platform Folder
22-Sep-2004 23:19 6.0.3790.212 542,208 Adsiis.dll IA64 Rtmgdr
22-Sep-2004 23:19 6.0.3790.212 790,528 Httpext.dll IA64 Rtmgdr
22-Sep-2004 23:19 8.50.2162.0 3,645,952 Msxml3.dll IA64 Rtmgdr
22-Sep-2004 23:23 6.0.3790.212 273,408 Wadsiis.dll X86 Rtmgdr\Wow
22-Sep-2004 23:23 8.50.2162.0 1,380,352 Wmsxml3.dll X86 Rtmgdr\Wow
22-Sep-2004 22:54 6.0.3790.215 549,888 Adsiis.dll IA64 Rtmqfe
22-Sep-2004 22:54 6.0.3790.212 790,528 Httpext.dll IA64 Rtmqfe
22-Sep-2004 22:54 8.50.2162.0 3,645,952 Msxml3.dll IA64 Rtmqfe
22-Sep-2004 22:54 6.0.3790.215 274,432 Wadsiis.dll X86 Rtmqfe\Wow
22-Sep-2004 22:54 8.50.2162.0 1,380,352 Wmsxml3.dll X86 Rtmqfe\Wow
Note When you install this security update on Windows Server 2003 or on Windows XP 64-Bit Edition Version 2003, the installer checks to see if any 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 files to your system. Otherwise, the installer copies the RTMGDR files to your system. For more information, see Microsoft Knowledge Base Article 824994.
Verifying Update Installation
• Microsoft Baseline Security Analyzer
To verify that a security update is installed on an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. This tool allows administrators to scan local and remote systems for missing security updates and for common security misconfigurations. For more information about MBSA, visit the Microsoft Baseline Security Analyzer Web site.
• 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 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 the update installation. 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.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP1\KB824151\Filelist
Note This registry key may not contain a complete list of installed files. Also, this registry key may not be created correctly if an administrator or an OEM integrates or slipstreams the security update into the Windows installation source files.
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Windows XP (all versions)
Note For Windows XP 64-Bit Edition Version 2003, this security update is the same as the Windows Server 2003 64-Bit Edition security update.
Prerequisites
This security update requires the release version of Windows XP or Windows XP Service Pack 1 (SP1). For more information, see Microsoft Knowledge Base Article 322389.
Inclusion in Future Service Packs:
The update for this issue will be included in Windows XP Service Pack 2.
Installation Information
This security update supports the following setup switches:
/help Displays the command line options
Setup Modes
/quiet Quiet mode (no user interaction or display)
/passive Unattended mode (progress bar only)
/uninstall Uninstalls the package
Restart Options
/norestart Do not restart when installation is complete
/forcerestart Restart after installation
Special Options
/l Lists installed Windows hotfixes or update packages
/o Overwrite OEM files without prompting
/n Do not backup files needed for uninstall
/f Force other programs to close when the computer shuts down
/extract Extracts files without starting setup
Note You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the previous version of the setup utility uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.
Deployment Information
To install the security update without any user intervention, use the following command at a command prompt for Windows XP:
Windowsxp-kb824151-x86-enu /passive /quiet
To install the security update without forcing the system to restart, use the following command at a command prompt for Windows XP:
Windowsxp-kb824151-x86-enu /norestart
For more information about how to deploy this security update with Software Update Services, visit the Software Update Services 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 is located in the %Windir%\$NTUninstallKB824151$\Spuninst folder. The Spuninst.exe utility supports the following setup switches:
/?: Show the list of installation switches.
/u: Use unattended mode.
/f: Force other programs to quit when the computer shuts down.
/z: Do not restart when the installation is complete.
/q: Use Quiet mode (no user interaction).
File Information
The English version of this update has the file attributes (or later) 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, Windows XP Professional, Windows XP Home Edition Service Pack 1, Windows XP Professional Service Pack 1, Windows XP Tablet PC Edition, and Windows XP Media Center Edition:
Date Time Version Size File name Folder
26-Aug-2004 18:39 8.50.2162.0 1,172,992 Msxml3.dll Rtmqfe
19-Sep-2004 05:31 5.5.31.0 30,720 Xpsp1hfm.exe Rtmqfe
26-Aug-2004 18:39 6.0.2600.165 240,640 Httpext.dll Rtmqfe\Ip
26-Aug-2004 18:54 8.50.2162.0 1,172,992 Msxml3.dll Sp1qfe
26-Aug-2004 18:54 6.0.2600.1579 242,688 Httpext.dll Sp1qfe\Ip
Windows XP 64-Bit Edition Service Pack 1:
Date Time Version Size File name Platform Folder
26-Aug-2004 18:46 6.0.2600.1579 940,032 Httpext.dll IA64 Sp1qfe
26-Aug-2004 18:46 8.50.2162.0 3,654,144 Msxml3.dll IA64 Sp1qfe
26-Aug-2004 18:54 8.50.2162.0 1,172,992 Wmsxml3.dll X86 Sp1qfe\Wow
Windows XP 64-Bit Edition Version 2003:
Date Time Version Size File name Platform Folder
22-Sep-2004 23:19 6.0.3790.212 542,208 Adsiis.dll IA64 Rtmgdr
22-Sep-2004 23:19 6.0.3790.212 790,528 Httpext.dll IA64 Rtmgdr
22-Sep-2004 23:19 8.50.2162.0 3,645,952 Msxml3.dll IA64 Rtmgdr
22-Sep-2004 23:23 6.0.3790.212 273,408 Wadsiis.dll X86 Rtmgdr\Wow
22-Sep-2004 23:23 8.50.2162.0 1,380,352 Wmsxml3.dll X86 Rtmgdr\Wow
22-Sep-2004 22:54 6.0.3790.215 549,888 Adsiis.dll IA64 Rtmqfe
22-Sep-2004 22:54 6.0.3790.212 790,528 Httpext.dll IA64 Rtmqfe
22-Sep-2004 22:54 8.50.2162.0 3,645,952 Msxml3.dll IA64 Rtmqfe
22-Sep-2004 22:54 6.0.3790.215 274,432 Wadsiis.dll X86 Rtmqfe\Wow
22-Sep-2004 22:54 8.50.2162.0 1,380,352 Wmsxml3.dll X86 Rtmqfe\Wow
Notes The Windows XP and Windows XP 64-Bit Edition Version 2003 versions of this security update are packaged as dual-mode packages, which contain files for both the original version of Windows XP and Windows XP Service Pack 1 (SP1). For more information about dual-mode packages, see Microsoft Knowledge Base Article 328848.
When you install the Windows XP 64-Bit Edition Version 2003 security update, the installer checks to see if any 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 files to your system. Otherwise, the installer copies the RTMGDR files to your system. For more information, see Microsoft Knowledge Base Article 824994.
Verifying Update Installation
• Microsoft Baseline Security Analyzer
To verify that a security update is installed on an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. This tool allows administrators to scan local and remote systems for missing security updates and for common security misconfigurations. For more information about MBSA, visit the Microsoft Baseline Security Analyzer Web site.
• 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 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 the update installation. 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.
For Windows XP Home Edition, Windows XP Professional, Windows XP Home Edition Service Pack 1, Windows XP Professional Service Pack 1, Windows XP 64-Bit Edition Service Pack 1, Windows XP Tablet PC Edition, and Windows XP Media Center Edition:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP2\KB824151\Filelist
For Windows XP 64-Bit Edition Version 2003:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP1\KB824151\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.
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Windows 2000 (all versions)
Prerequisites
For Windows 2000, this security update requires Service Pack 3 (SP3) or Service Pack 4 (SP4).
The software that is listed has been tested to determine if the versions are affected. Other versions either no longer include security update support or may not be affected. To determine the support lifecycle 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 will be included in Windows 2000 Service Pack 5.
Installation Information
This security update supports the following setup switches:
/help Displays the command line options
Setup Modes
/quiet Quiet mode (no user interaction or display)
/passive Unattended mode (progress bar only)
/uninstall Uninstalls the package
Restart Options
/norestart Do not restart when installation is complete
/forcerestart Restart after installation
Special Options
/l Lists installed Windows hotfixes or update packages
/o Overwrite OEM files without prompting
/n Do not backup files needed for uninstall
/f Force other programs to close when the computer shuts down
/extract Extracts files without starting setup
Note You can combine these switches into one command. For backward compatibility, the security update also supports the setup switches that the previous version of the setup utility uses. For more information about the supported installation switches, see Microsoft Knowledge Base Article 262841.
Deployment Information
To install the security update without any user intervention, use the following command at a command prompt for Windows 2000 Service Pack 3 and Windows 2000 Service Pack 4:
Windows2000-kb824151-x86-enu /passive /quiet
To install the security update without forcing the system to restart, use the following command at a command prompt for Windows 2000 Service Pack 3 and Windows 2000 Service Pack 4:
Windows2000-kb824151-x86-enu /norestart
For more information about how to deploy this security update with Software Update Services, visit the Software Update Services 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%\$NTUninstallKB824151$\Spuninst folder. The Spuninst.exe utility supports the following setup switches:
/?: Show the list of installation switches.
/u: Use unattended mode.
/f: Force other programs to quit when the computer shuts down.
/z: Do not restart when the installation is complete.
/q: Use Quiet mode (no user interaction).
File Information
The English version of this update has the file attributes (or later) 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.
Note Date, time, file name, or size information could change during installation. See the Verifying Update Installation section for details about how to verify an installation.
Windows 2000 Service Pack 3 and Windows 2000 Service Pack 4:
Date Time Version Size File name
16-Aug-2004 22:49 5.0.2195.6958 247,056 Httpext.dll
16-Jul-2004 19:07 8.50.2162.0 1,172,992 Msxml3.dll
07-Jul-2004 18:41 8.20.8730.1 44,032 Msxml3r.dll
Verifying Update Installation
• Microsoft Baseline Security Analyzer
To verify that a security update is installed on an affected system, you may be able to use the Microsoft Baseline Security Analyzer (MBSA) tool. This tool allows administrators to scan local and remote systems for missing security updates and for common security misconfigurations. For more information about MBSA, visit the Microsoft Baseline Security Analyzer Web site.
• 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 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 the update installation. 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\KB824151\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 824151 security update into the Windows installation source files.
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Acknowledgments
Microsoft thanks the following for working with us to help protect customers:
• Amit Klein and Sanctum, Inc. for reporting the WebDAV Vulnerability (CAN-2003-0718).
Obtaining Other Security Updates:
Updates for other security issues are available from the following locations:
• Security updates are available from the Microsoft Download Center: You can find them most easily by doing a keyword search for "security_patch".
• Updates for consumer platforms are available from the Windows 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.
• Microsoft Software Update Services
• Microsoft Baseline Security Analyzer (MBSA)
• Windows 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 this security update with Software Update Services, visit the Software 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 to 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, see 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 and the Microsoft Office Detection 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, see 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:
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 12, 2004: Bulletin published
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