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Microsoft Security Bulletin MS04-016

Vulnerability in DirectPlay Could Allow Denial of Service (839643)

Issued: June 8, 2004
Updated: June 16, 2004
Version: 1.1

Summary

Who should read this document: Customers who use Microsoft® Windows®

Impact of Vulnerability: Denial of Service

Maximum Severity Rating: Moderate

Recommendation: Customers should consider applying the security update.

Security Update Replacement: None

Caveats: Subsequent to the release of this bulletin, an additional FAQ has been added to the "Frequently asked questions (FAQ) related to this security update" section to help customers determine which update to apply to their systems.

Tested Software and Security Update Download Locations:

Affected Software:

•	Microsoft Windows 2000 Service Pack 2, Microsoft Windows 2000 Service Pack 3, 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
•	Microsoft Windows 98, Microsoft Windows 98 Second Edition (SE), and Microsoft Windows Millennium Edition (Me) – Review the FAQ section of this bulletin for details about these operating systems.

Non-Affected Software:

•	Microsoft Windows NT® Workstation 4.0 Service Pack 6a
•	Microsoft Windows NT Server 4.0 Service Pack 6a
•	Microsoft Windows NT Server 4.0 Terminal Server Edition Service Pack 6

Tested Microsoft Windows Components:

Affected Components:

•	Microsoft DirectX® 7.0a, 7.1, 8.1, 8.1a, 8.1b, 8.2, 9.0, 9.0a, 9.0b on Windows 98, Windows 98 Second Edition, Windows Millennium Edition - Review the FAQ section of this bulletin for details about these operating systems.
•	Microsoft DirectX 8.0, 8.0a, when installed on Windows 2000 – Download the update
•	Microsoft DirectX 8.1, 8.1a, 8.1b when installed on Windows 2000 – Download the update
•	Microsoft DirectX 8.2 when installed on Windows 2000, or Windows XP – Download the update
•	Microsoft DirectX 9.0, 9.0a, 9.0b when installed on Windows 2000, Windows XP, or Windows Server 2003 – Download the update

Non-Affected Components:

•	Microsoft DirectX 5.2 on Windows 98
•	Microsoft DirectX 6.1 on Windows 98 Second Edition
•	Windows Media Player 6.4 or Internet Explorer 6 Service Pack 1 when installed on Microsoft Windows NT 4.0
•	Windows Media Player 6.4 or Internet Explorer 6 Service Pack 1 when installed on Microsoft Windows NT 4.0, Terminal Server Edition

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 following Microsoft Support Lifecycle Web site.

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General Information

Executive Summary

Executive Summary:

This update resolves a newly-discovered, privately reported vulnerability. A denial of service vulnerability exists in the implementation of the IDirectPlay4 application programming interface (API) of Microsoft DirectPlay because of a lack of robust packet validation. The vulnerability is documented in the Vulnerability Details section of this bulletin.

If a user is running a networked DirectPlay application, an attacker who successfully exploited this vulnerability could cause the DirectPlay application to fail. The user would have to restart the application to resume functionality.

Microsoft recommends that customers should consider applying the security update.

Severity Ratings and Vulnerability Identifiers:

Vulnerability Identifiers	Impact of Vulnerability	Windows 98, 98 SE, Me	Windows 2000	Windows XP	Windows Server 2003
DirectPlay Vulnerability - CAN-2004-0202	Denial of Service	Not Critical	Moderate	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

How can I determine which update to apply to my system?
The downloads listed at the beginning of this update are divided into two categories:

1.	Affected Software
2.	Affected Components

The downloads listed next to the operating systems under "Affected Software" pertain to systems that have not upgraded to a more recent version of DirectX. In the event that DirectX has been upgraded on the system, a user will need to install a download that matches the current version of DirectX on their system from the "Affected Components" section.

How can I determine if I am running an updated version of DirectX on my system?
DirectX updates are frequently made available as recommended updates on Windows Update. To determine if you have upgraded to a newer version of DirectX, do the following: 1. Start--> Run 2. Type in DXDiag.exe

The DirectX Diagnostic Tool is launched, showing the current version of DirectX running on the system.

Which versions of DirectX requires that I install an update from the "Affected Software" section?

•	DirectX version 7.0 shipped on Windows 2000 and requires the Windows 2000 update from the "Affected Software" section.
•	DirectX version 8.1 shipped on Windows XP and Windows Server 2003 and requires the corresponding update from the "Affected Software" section.

Which versions of DirectX requires that I install an update from the "Affected Components" section?

•	Microsoft DirectX 8.0, 8.0a, when installed on Windows 2000 requires the DirectX 8.0 update from the "Affected Components" section above.
•	Microsoft DirectX 8.1, 8.1a, 8.1b when installed on Windows 2000 requires the DirectX 8.1 update from the "Affected Components" section above.
•	Microsoft DirectX 8.2 when installed on Windows 2000, or Windows XP requires the DirectX 8.2 update from the "Affected Components" section above.
•	Microsoft DirectX 9.0, 9.0a, 9.0b when installed on Windows 2000, Windows XP, or Windows Server 2003 requires the DirectX 9.0 update from the "Affected Components" section above.

How does the extended support for Windows 98, Windows 98 Second Edition, and Windows Millennium Edition affect the release of security updates for these operating systems?
Microsoft will only release security updates for critical security issues. Non-critical security issues are not offered during this support period. For more information about the Microsoft Support Lifecycle policies for these operating systems, visit the following Web site

For more information about severity ratings, visit the following Web site.

Are Windows 98, Windows 98 Second Edition, or Windows Millennium Edition critically affected by any of the vulnerabilities that are addressed in this security bulletin?
No. None of these vulnerabilities are critical in severity on Windows 98, on Windows 98 Second Edition, or on Windows Millennium Edition.

Can I use the Microsoft Baseline Security Analyzer (MBSA) to determine if this update is required?
MBSA does not currently support the detection of DirectX. For detailed information about the programs that MBSA currently does not detect, see Microsoft Knowledge Base Article 306460. For more information about MBSA, visit the MBSA Web site.

Can I use Systems Management Server (SMS) to determine if this update is required?
SMS uses MBSA for detection. This update is not detected by MBSA. However, the file and registry key information that is available in this bulletin can be used to write specific file and registry key collection queries in SMS to detect vulnerable computers. For information about SMS, visit the SMS Web site.

You can deploy this update using Inventory and Software Distribution feature of SMS.

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Vulnerability Details

DirectPlay Vulnerability - CAN-2004- 0202:

A denial of service vulnerability exists in the IDirectPlay4 Application Programming Interface (API) of Microsoft DirectPlay. Applications that implement this API are typically network-based multi-player games. An attacker who successfully exploited this vulnerability could cause the application to fail.

Mitigating factors for DirectPlay Vulnerability - CAN-2004- 0202:

•	Windows NT 4.0 is not affected by this vulnerability.
•	Only the version 4 interfaces are affected by this vulnerability. If an application is using the version 8 interfaces, it is not affected. Newer games and applications are designed by using the version 8 interfaces.
•	For an attack to be successful, a system would need to be actively running a DirectPlay game.
•	Because DirectPlay is a network protocol that is designed to allow multi-player games, users who are playing games that do not use the version 4 interfaces of DirectPlay are not vulnerable to an attack.
•	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.

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Workarounds for DirectPlay Vulnerability - CAN-2004- 0202:

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.

Do not run games or applications that are coded with the Version 4 DirectPlay APIs.

Newer games and applications are typically coded by using the version 8 DirectPlay APIs. Although a complete list of games and applications that use the less recent DirectPlay 4 APIs is not currently available, these items are typically older computer games. The newer versions are not vulnerable.

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FAQ for DirectPlay Vulnerability - CAN-2004- 0202:

What is the scope of the vulnerability?
This is a denial of service vulnerability in the IDirectPlay4 API of Microsoft DirectPlay. Only the version 4 interfaces are affected by this vulnerability. Applications that implement these APIs are typically network-based multi-player games. An attacker who successfully exploited this vulnerability could cause the application to fail.

What causes the vulnerability?
The implementation of the IDirectPlay4 APIs within DirectPlay does not perform robust packet validation.

What is DirectPlay?
DirectPlay is a network protocol that shipped with Microsoft DirectX to help game developers create multi-player networked games without having to implement sophisticated network protocols. The version 4 implementation affected by this vulnerability is comprised of a set of three API interfaces. These interfaces include IDirectPlay4Server, IDirectPlay4Client, and IDirectPlay4Peer. Each of these interfaces launches network code which must be invoked for a system to be vulnerable to attack.

What is DirectX?
Microsoft DirectX is a group of technologies that is designed to make Windows-based computers an ideal platform for running and displaying applications that are rich in multimedia elements such as full-color graphics, video, 3-D animation, and surround sound. DirectX is comprised of a set of low-level APIs that are used by Windows programs for multimedia support. The vulnerability covered in this update is in the implementation of the IDirectPlay4 APIs of the DirectPlay technology.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could cause the DirectPlay application to fail, which would interrupt its normal operation. The user would have to restart the application for functionality to resume.

Who could exploit the vulnerability?
Any anonymous user who could locate a system that is running a version 4 implementation of a DirectPlay-based application, establish a connection and deliver a malformed packet to the affected system could try to exploit this vulnerability.

How could an attacker exploit the vulnerability?
An attacker could exploit the vulnerability by creating a malformed packet, establishing a connection and sending the packet to an affected system, which could then cause the DirectPlay application to fail.

What systems are primarily at risk from the vulnerability?
Because the affected component is within the DirectPlay network technology, systems that are used for multi-player network gaming are primarily at risk from this vulnerability.

Are Windows 98, Windows 98 Second Edition or Windows Millennium Edition critically affected by this vulnerability?
No. Although Windows Millennium Edition does contain the affected component, the vulnerability is not critical. For more information about severity ratings, visit the following Web site.

What does the update do?
The update removes the vulnerability by implementing more robust packet validation.

When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft had not received any information indicating 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 indicating 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.

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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 released 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

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-kb839643-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-kb839643-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

In some cases, this update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason or if required files are in use, this update will require a restart. If this occurs, a message appears that advises you to restart.

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%\$NTUninstallKB839643$\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
   -------------------------------------------------------------------------
  05-May-2004 22:58   5.2.3790.170   8,704    Custom_uninstall.dll 
  07-May-2004 20:08   5.2.3790.163  221,184   Dplayx.dll         RTMGDR
  07-May-2004 20:08   5.2.3790.163  55,296    Dpwsockx.dll       RTMGDR
  07-May-2004 20:09   5.2.3790.163  221,184   Dplayx.dll         RTMQFE
  07-May-2004 20:09   5.2.3790.163  55,296    Dpwsockx.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
   -------------------------------------------------------------------------
   05-May-2004  22:57  5.2.3790.170       19,456  Custom_uninstall.dll  IA64
   07-May-2004  20:08  5.2.3790.163      221,184  Wdplayx.dll           X86  RTMGDR\WOW
   07-May-2004  20:08  5.2.3790.163       55,296  Wdpwsockx.dll         X86  RTMGDR\WOW
   07-May-2004  20:09  5.2.3790.163      221,184  Wdplayx.dll           X86  RTMQFE\WOW
   07-May-2004  20:09  5.2.3790.163       55,296  Wdpwsockx.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

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 Server 2003\SP1\KB839643\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 839643 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

Deployment Information

To install the security update without any user intervention, use the following command at a command prompt for Windows XP:

Windowsxp-kb839643-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-kb839643-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

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%\$NTUninstallKB839643$\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

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
   -----------------------------------------------------------------------------
   05-May-2004 23:10  5.1.2600.149  8,192  Custom_uninstall.dll      SP1
   12-May-2004  20:27  5.1.2600.148   214,528  Dplayx.dll             SP1
   12-May-2004  20:27  5.1.2600.148   50,176  Dpwsockx.dll            SP1
   05-May-2004  23:03  5.1.2600.1525  8,192  Custom_uninstall.dll     SP2
   12-May-2004  22:29  5.1.2600.1517  214,528  Dplayx.dll             SP2
   12-May-2004  22:29  5.1.2600.1517  50,176  Dpwsockx.dll            SP2

Windows XP 64-Bit Edition Service Pack 1:

   Date         Time   Version        Size       File name         Platform
   --------------------------------------------------------------------------
   05-May-2004  23:03  5.1.2600.1524   18,944  Custom_uninstall.dll  IA64
   06-May-2004  21:13  5.1.2600.1517   214,528  Wdplayx.dll          X86
   06-May-2004  21:13  5.1.2600.1517   50,176  Wdpwsockx.dll         X86

Windows XP 64-Bit Edition Version 2003:

   Date         Time   Version      Size       File name    Platform  Folder
   -------------------------------------------------------------------------
   05-May-2004  22:57  5.2.3790.170       19,456  Custom_uninstall.dll  IA64
   07-May-2004  20:08  5.2.3790.163      221,184  Wdplayx.dll           X86       RTMGDR\WOW
   07-May-2004  20:08  5.2.3790.163       55,296  Wdpwsockx.dll         X86       RTMGDR\WOW
   07-May-2004  20:09  5.2.3790.163      221,184  Wdplayx.dll           X86       RTMQFE\WOW
   07-May-2004  20:09  5.2.3790.163       55,296  Wdpwsockx.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

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\KB839643\Filelist

For Windows XP 64-Bit Edition Version 2003:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP1\KB839643\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 839643 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 2 (SP2), 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

Deployment Information

To install the security update without any user intervention, use the following command at a command prompt for Windows 2000 Service Pack 2, Windows 2000 Service Pack 3, and Windows 2000 Service Pack 4:

Windows2000-kb839643-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 2, Windows 2000 Service Pack 3, and Windows 2000 Service Pack 4:

Windows2000-kb839643-x86-enu /norestart

Restart Requirement

Removal Information

To remove this security update, use the Add or Remove Programs tool in Control Panel.

/?: 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

Note Date, time, and filename information could change during installation. Refer to the Verifying Update Installation section for details on verifying an installation.

Windows 2000 Service Pack 2, Windows 2000 Service Pack 3, and Windows 2000 Service Pack 4:

   Date         Time   Version        Size     File name
   ------------------------------------------------------
   05-May-2004  23:15  5.0.2195.6927       8,464  Custom_uninstall.dll  
   06-May-2004  19:11  5.0.2195.6922     220,432  Dplayx.dll       
   06-May-2004  19:11  5.0.2195.6922      44,304  Dpwsockx.dll

Verifying Update Installation

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\KB839643\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 839643 security update into the Windows installation source files.

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DirectX Standalone (all versions)

Prerequisites
This security update requires a released version of the affected product.

Inclusion in Future Service Packs:
The update for this issue will be included in DirectX 9.0c.

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

Deployment Information for DirectX 8.0

To install the security update without any user intervention, use the following command at a command prompt for DirectX 8.0:

DirectX80-KB839643-enu /passive /quiet

To install the security update without forcing the system to restart, use the following command at a command prompt for DirectX 8.0:

DirectX80-kb839643-x86-enu /norestart

Deployment Information for DirectX 8.1

To install the security update without any user intervention, use the following command at a command prompt for DirectX 8.1:

DirectX81-kb839643-x86-enu /passive /quiet

To install the security update without forcing the system to restart, use the following command at a command prompt for DirectX 8.1:

DirectX81-kb839643-x86-enu /norestart

Deployment Information for DirectX 8.2

To install the security update without any user intervention, use the following command at a command prompt for DirectX 8.2:

DirectX82-kb839643-x86-enu /passive /quiet

To install the security update without forcing the system to restart, use the following command at a command prompt for DirectX 8.2:

DirectX82-kb839643-x86-enu /norestart

Deployment Information for DirectX 9.0

To install the security update without any user intervention, use the following command at a command prompt for DirectX 9.0:

DirectX90-kb839643-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 2003DirectX 9.0:

DirectX90-kb839643-x86-enu /norestart

Restart Requirement

Removal Information

To remove this security update, use the Add or Remove Programs tool in Control Panel.

/?: 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

Note Date, time, and filename information could change during installation. Refer to the Verifying Update Installation section for details on verifying an installation.

DirectX 8.0 when installed on Windows 2000:

   Date         Time   Version      Size       File name 
  -------------------------------------------------------
   07-May-2004  17:17  5.3.1.904    9,216     Custom_uninstall.dll  
   14-Apr-2004  21:55  5.1.2258.410 233,984  Dplayx.dll       
   13-Apr-2004  06:13  5.1.2258.410  88,064  Dpwsockx.dll

Verifying Update Installation

You may be able to verify the files that this security update has installed by reviewing the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\DirectX\DX8\SP1\KB839643-DirectX8

Note This registry key may not be created correctly when an administrator or an OEM integrates or slipstreams the 839643 security update into the Windows installation source files.

DirectX 8.1 when installed on Windows 2000, Windows XP or Windows Server 2003:

   Date         Time   Version      Size       File name    
   -------------------------------------------------------------
   07-May-2004  17:17  5.3.1.904     9,216  Custom_uninstall.dll  
   14-Apr-2004  21:56  5.1.2600.891  214,528  Dplayx.dll       
   13-Apr-2004  06:19  5.1.2600.891  73,216  Dpwsockx.dll

Verifying Update Installation

You may be able to verify the files that this security update has installed by reviewing the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\DirectX\DX8.1\SP1\KB839643-DirectX81

Note This registry key may not be created correctly when an administrator or an OEM integrates or slipstreams the 839643 security update into the Windows installation source files.

DirectX 8.2 when installed on Windows 2000, Windows XP or Windows Server 2003:

   Date         Time   Version      Size       File name    
   -------------------------------------------------------------
   07-May-2004  17:17  5.3.1.904    9,216    Custom_uninstall.dll  
   14-Apr-2004  21:57  5.2.3677.144 219,648  Dplayx.dll       
   13-Apr-2004  06:12  5.2.3677.144 76,800   Dpwsockx.dll

Verifying Update Installation

You may be able to verify the files that this security update has installed by reviewing the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\DirectX\DX8.2\SP1\KB839643-DirectX82

Note This registry key may not be created correctly when an administrator or an OEM integrates or slipstreams the 839643 security update into the Windows installation source files.

DirectX 9.0 when installed on Windows 2000, Windows XP or Windows Server 2003:

   Date         Time   Version      Size       File name 
  -----------------------------------------------------------------
   07-May-2004  17:17  5.3.1.904    9,216      Custom_uninstall.dll  
   14-Apr-2004  21:56  5.3.0.903    219,648    Dplayx.dll       
   13-Apr-2004  06:11  5.3.0.903    76,800     Dpwsockx.dll

Verifying Update Installation

You may be able to verify the files that this security update has installed by reviewing the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\DirectX\DX9\SP1\KB839643-DirectX9

Note This registry key may not be created correctly when an administrator or an OEM integrates or slipstreams the 839643 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:

•	John Lampe Tenable Network Security for reporting the vulnerability (CAN-2004-0202).

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 (June 8, 2004): Bulletin published
•	V1.1 (June 16, 2004): Subsequent to the release of this bulletin, an additional FAQ has been added to the "Frequently asked questions (FAQ) related to this security update" section to help customers determine which update to apply to their systems.

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