Symptoms

Assume that you run an application that calls the NCryptExportKey function to export a key on a Windows Server 2008-based computer. The key has more than one master key. In this situation, Lsass.exe experiences high memory usage and a rapid increase in the number of used handles. Additionally, the computer exhibits high CPU usage.

Note This issue also occurs when you access a Windows Server 2008-based computer by using Remote Desktop Protocol (RDP).

Cause

This issue occurs because of an infinite loop in ncrypt.dll.

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 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 website:

http://support.microsoft.com/contactus/?ws=supportNote 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, you must be running Windows Server 2008 Service Pack 2 (SP2).

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

968849 How to obtain the latest service pack for Windows Server 2008

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows Server 2008 file information notesImportant Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.0.600
    2.23xxx

    Windows Server 2008

    SP2

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately¬†in the "Additional file information for Windows Server 2008" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ncrypt.dll

6.0.6002.23070

204,288

03-Mar-2013

03:09

x86

For all supported x64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ncrypt.dll

6.0.6002.23070

253,952

02-Mar-2013

23:16

x64

For all supported IA-64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ncrypt.dll

6.0.6002.23070

516,608

02-Mar-2013

21:45

IA-64


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 about software update terminology, 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 file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008

File name

X86_microsoft-windows-ncrypt-dll_31bf3856ad364e35_6.0.6002.23070_none_6002a1d50818db17.manifest

File version

Not applicable

File size

5,579

Date (UTC)

03-Mar-2013

Time (UTC)

03:25

Platform

Not applicable

Additional files for all supported x64-based versions of Windows Server 2008

File name

Amd64_microsoft-windows-ncrypt-dll_31bf3856ad364e35_6.0.6002.23070_none_bc213d58c0764c4d.manifest

File version

Not applicable

File size

5,599

Date (UTC)

02-Mar-2013

Time (UTC)

23:34

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008

File name

Ia64_microsoft-windows-ncrypt-dll_31bf3856ad364e35_6.0.6002.23070_none_600445cb0816e413.manifest

File version

Not applicable

File size

5,589

Date (UTC)

02-Mar-2013

Time (UTC)

21:57

Platform

Not applicable


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