When many SSL connections are established on a Windows Server 2008-based computer, the computer eventually stops responding because of a memory leak

When many SSL connections are established on a Windows Server 2008-based computer, the computer eventually stops responding because of a memory leak

Article ID : 953535
Last Review : June 23, 2008
Revision : 1.0
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SYMPTOMS

After many Secure Sockets Layer (SSL) connections are established on a Windows Server 2008-based computer, the computer stops responding.

If you debug this problem, the debug log indicates that the Cngb and SslC tags are using most of the available paged pool memory.

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CAUSE

This problem occurs because the Ksecdd.sys driver does not release the old SSL user context when renegotiation occurs. Each SSL user context uses some paged pool memory. Therefore, the system stops responding after the available paged pool memory is exhausted.

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RESOLUTION

Hotfix information

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 this specific problem. 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 (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

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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, x86-based versions
File name File version File size Date Time Platform
Ksecdd.sys 6.0.6001.22196 441,400 05-Jun-2008 05:00 x86
Lsasrv.dll 6.0.6001.22196 1,255,424 05-Jun-2008 04:48 x86
Lsasrv.mof Not Applicable 13,780 18-Dec-2007 21:23 Not Applicable
Lsass.exe 6.0.6001.22196 9,728 05-Jun-2008 02:27 x86
Secur32.dll 6.0.6001.22196 72,704 05-Jun-2008 04:48 x86
Windows Server 2008, Itanium-based versions
File name File version File size Date Time Platform
Ksecdd.sys 6.0.6001.22196 1,025,592 05-Jun-2008 05:04 IA-64
Lsasrv.dll 6.0.6001.22196 3,243,008 05-Jun-2008 04:53 IA-64
Lsasrv.mof Not Applicable 13,780 18-Dec-2007 21:23 Not Applicable
Lsass.exe 6.0.6001.22196 17,920 05-Jun-2008 02:38 IA-64
Secur32.dll 6.0.6001.22196 202,752 05-Jun-2008 04:55 IA-64
Lsasrv.mof Not Applicable 13,780 18-Dec-2007 21:23 Not Applicable
Secur32.dll 6.0.6001.22196 76,800 05-Jun-2008 04:49 x86
Windows Server 2008, x64-based versions
File name File version File size Date Time Platform
Ksecdd.sys 6.0.6001.22196 515,640 05-Jun-2008 06:26 x64
Lsasrv.dll 6.0.6001.22196 1,691,648 05-Jun-2008 05:18 x64
Lsasrv.mof Not Applicable 13,780 18-Dec-2007 21:23 Not Applicable
Lsass.exe 6.0.6001.22196 11,264 05-Jun-2008 02:58 x64
Secur32.dll 6.0.6001.22196 94,208 05-Jun-2008 05:18 x64
Lsasrv.mof Not Applicable 13,780 18-Dec-2007 21:23 Not Applicable
Secur32.dll 6.0.6001.22196 76,800 05-Jun-2008 04:49 x86

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STATUS

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

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MORE INFORMATION

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 (/Feedback.aspx?kbNumber=824684/) Description of the standard terminology that is used to describe Microsoft software updates

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APPLIES TO
• Windows Server 2008 Standard
• Windows Server 2008 Enterprise
• Windows Server 2008 Datacenter
• Windows Server 2008 Datacenter without Hyper-V
• Windows Server 2008 Enterprise without Hyper-V
• Windows Server 2008 for Itanium-Based Systems
• Windows Server 2008 Standard without Hyper-V
• Windows Web Server 2008

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Keywords: 
kbautohotfix kbexpertiseinter kbbug kbfix kbhotfixserver kbqfe KB953535

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