A Windows Server 2003-based or Windows Server 2008-based terminal server stops accepting new connections, and existing connections stop responding

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Article ID: 956438 - View products that this article applies to.
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Symptoms

You have a Windows Server 2003-based or Windows Server 2008-based terminal server that stops accepting new connections. Additionally, existing connections stop responding. When this issue occurs, one thread may run in an infinite loop on a processor.

Cause

This issue occurs because of incorrect synchronization within a very small timing window in the Terminal Services device driver (TermDD.sys). This issue occurs when a session is disconnected while a specific flow control operation is active. The vulnerable flow control functions are typically used by third-party software vendors such as Citrix.

Resolution

This hotfix is also available at Microsoft Update Catalog.

Hotfix information

Windows Server 2003

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites
To apply this hotfix, the computer must run Windows Server 2003 Service Pack 1 or Windows Server 2003 Service Pack 2.
Restart requirement
You have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.
Registry information
To use this hotfix, you do not have to make any changes to the registry.
File information
The English version of this hotfix has the file attributes (or later 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 item in Control Panel.

Windows Server 2003 Service Pack 1, x86-based version
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File nameFile versionFile sizeDateTimePlatform
Termdd.sys5.2.3790.328942,12002-Feb-200915:02x86

Windows Server 2003 Service Pack 2, x86-based version
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File nameFile versionFile sizeDateTimePlatform
Termdd.sys5.2.3790.445442,12002-Feb-200914:55x86

Windows Server 2003 Service Pack 1, Itanium-based version
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File nameFile versionFile sizeDateTimePlatform
Termdd.sys5.2.3790.3289143,49602-Feb-200912:43IA-64

Windows Server 2003 Service Pack 2, Itanium-based version
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File nameFile versionFile sizeDateTimePlatform
Termdd.sys5.2.3790.4454144,00802-Feb-200912:46IA-64

Windows Server 2003, x64-based version
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Termdd.sys5.2.3790.328972,32802-Feb-200912:43x64

Windows Server 2003 Service Pack 2, x64-based version
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File nameFile versionFile sizeDateTimePlatform
Termdd.sys5.2.3790.445472,32802-Feb-200912:50x64

Windows Server 2008

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.
Prerequisites
To apply this hotfix, the computer must run Windows Server 2008.
Restart requirement
You have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.
Registry information
To use this hotfix, you do not have to make any changes to the registry.
File information
The English version of this hotfix has the file attributes (or later 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 item in Control Panel.

Windows Server 2008 file information note
The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

Windows Server 2008, x86-based version
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File nameFile versionFile sizeDateTimePlatform
Agp440.sys6.0.6001.2236654,75202-Feb-200906:00x86
Amdagp.sys6.0.6001.2236655,79202-Feb-200906:00x86
Isapnp.sys6.0.6001.2236648,09602-Feb-200905:58x86
Machine.infNot Applicable288,44402-Feb-200901:00Not Applicable
Msisadrv.sys6.0.6001.2236614,83202-Feb-200905:59x86
Mssmbios.sys6.0.6001.2236629,68002-Feb-200905:59x86
Nv_agp.sys6.0.6001.22366107,48802-Feb-200906:00x86
Pci.sys6.0.6001.22366149,47202-Feb-200906:00x86
Rdpdr.sys6.0.6001.22366248,83202-Feb-200903:56x86
Sisagp.sys6.0.6001.2236654,24002-Feb-200905:59x86
Streamci.dll6.0.6001.2236623,52002-Feb-200905:59x86
Swenum.sys6.0.6001.2236613,68002-Feb-200905:59Not Applicable
Termdd.sys6.0.6001.2236653,21602-Feb-200905:59x86
Uliagpkx.sys6.0.6001.2236659,37602-Feb-200906:00x86
Viaagp.sys6.0.6001.2236655,28002-Feb-200906:00x86
Volmgr.sys6.0.6001.2236651,16802-Feb-200905:59x86

Windows Server 2008, Itanium-based version
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Agp460.sys6.0.6001.22366136,70402-Feb-200902:28IA-64
Isapnp.sys6.0.6001.2236635,80802-Feb-200905:48IA-64
Machine.infNot Applicable270,75801-Feb-200923:56Not Applicable
Msisadrv.sys6.0.6001.2236623,52002-Feb-200905:36IA-64
Mssmbios.sys6.0.6001.2236655,77602-Feb-200905:36IA-64
Pci.sys6.0.6001.22366438,24002-Feb-200905:37IA-64
Rdpdr.sys6.0.6001.22366709,63202-Feb-200903:22IA-64
Streamci.dll6.0.6001.2236644,51202-Feb-200905:39IA-64
Swenum.sys6.0.6001.2236617,63202-Feb-200905:50Not Applicable
Termdd.sys6.0.6001.22366158,19202-Feb-200905:39IA-64
Volmgr.sys6.0.6001.22366146,92802-Feb-200905:39IA-64

Windows Server 2008, x64-based version
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Agp440.sys6.0.6001.2236662,96002-Feb-200906:47x64
Isapnp.sys6.0.6001.2236622,00002-Feb-200906:46x64
Machine.infNot Applicable276,56402-Feb-200901:00Not Applicable
Msisadrv.sys6.0.6001.2236616,36802-Feb-200906:46x64
Mssmbios.sys6.0.6001.2236633,26402-Feb-200906:47x64
Nv_agp.sys6.0.6001.22366124,91202-Feb-200906:47x64
Pci.sys6.0.6001.22366178,16002-Feb-200906:47x64
Rdpdr.sys6.0.6001.22366314,36802-Feb-200904:29x64
Streamci.dll6.0.6001.2236625,07202-Feb-200906:48x64
Swenum.sys6.0.6001.2236613,92002-Feb-200906:47x64
Termdd.sys6.0.6001.2236662,44802-Feb-200906:47x64
Uliagpkx.sys6.0.6001.2236666,54402-Feb-200906:48x64
Volmgr.sys6.0.6001.2236667,05602-Feb-200906:48x64

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More information

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Additional files for all supported x86-based versions of Windows Server 2008
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File nameFile versionFile sizeDateTimePlatform
Package_for_kb956438_client_1~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,36702-Feb-200914:06Not Applicable
Package_for_kb956438_client~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,43102-Feb-200914:06Not Applicable
Package_for_kb956438_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42102-Feb-200914:06Not Applicable
Package_for_kb956438_sc~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42302-Feb-200914:06Not Applicable
Package_for_kb956438_server_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42502-Feb-200914:06Not Applicable
Package_for_kb956438_server~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,43102-Feb-200914:06Not Applicable
Package_for_kb956438_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42202-Feb-200914:06Not Applicable
Package_for_kb956438_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mumNot Applicable1,42902-Feb-200914:06Not Applicable
X86_machine.inf_31bf3856ad364e35_6.0.6001.22366_none_ba61b006d7f9b342.manifestNot Applicable9,97402-Feb-200914:08Not Applicable
Additional files for all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ia64_machine.inf_31bf3856ad364e35_6.0.6001.22366_none_ba6353fcd7f7bc3e.manifestNot Applicable7,08102-Feb-200914:06Not Applicable
Package_for_kb956438_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42502-Feb-200914:06Not Applicable
Package_for_kb956438_sc~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42602-Feb-200914:06Not Applicable
Package_for_kb956438_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42902-Feb-200914:06Not Applicable
Package_for_kb956438_server~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,43402-Feb-200914:06Not Applicable
Package_for_kb956438_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,42602-Feb-200914:06Not Applicable
Package_for_kb956438_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mumNot Applicable1,43302-Feb-200914:06Not Applicable
Additional files for all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Amd64_machine.inf_31bf3856ad364e35_6.0.6001.22366_none_16804b8a90572478.manifestNot Applicable8,24202-Feb-200914:10Not Applicable
Package_for_kb956438_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,37502-Feb-200914:06Not Applicable
Package_for_kb956438_client~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43902-Feb-200914:06Not Applicable
Package_for_kb956438_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,42902-Feb-200914:06Not Applicable
Package_for_kb956438_sc~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43102-Feb-200914:06Not Applicable
Package_for_kb956438_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43302-Feb-200914:06Not Applicable
Package_for_kb956438_server~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43902-Feb-200914:06Not Applicable
Package_for_kb956438_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43002-Feb-200914:06Not Applicable
Package_for_kb956438_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mumNot Applicable1,43702-Feb-200914:06Not Applicable
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Properties

Article ID: 956438 - Last Review: May 24, 2013 - Revision: 3.0
Applies to
  • Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
  • Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
  • Microsoft Windows Server 2003, Datacenter x64 Edition
  • Microsoft Windows Server 2003, Enterprise x64 Edition
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
  • Microsoft Windows Server 2003, Standard x64 Edition
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
Keywords: 
kbautohotfix kbexpertiseadvanced kbfix kbsurveynew kbqfe KB956438

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