Microsoft KB Archive/895325

= Lsass.exe crashes soon after you log on to a computer that is running Windows XP Service Pack 2 (SP2) by using a smart card =

Article ID: 895325

Article Last Modified on 8/29/2007

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APPLIES TO

 Microsoft Windows XP Service Pack 2, when used with:  Microsoft Windows XP Professional

 Microsoft Windows XP Home Edition 

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''The example companies, organizations, products, domain names, e-mail addresses, logos, people, places, and events depicted herein are fictitious. No association with any real company, organization, product, domain name, e-mail address, logo, person, places, or events is intended or should be inferred.''



SYMPTOMS
When you use smart card authentication to log on to a computer that is running Microsoft Windows XP Service Pack 2 (SP2), the logon process is successful. However, after several moments, the Lsass.exe process crashes.

You do not experience this problem on a computer that is running Windows XP Service Pack 1 (SP1).



CAUSE
This problem occurs because of heap corruption that may occur in the Lsass.exe process when you log on by using a smart card.

This problem occurs if the subject field of the certificate on the smart card is in a particular order. In this scenario, if the domain component of the subject field is not in the last few attributes, Lsass.exe experiences heap corruption. Then, the process crashes. The following example subject fields illustrate this problem.

Example 1:

DC = WIDGETS

DC = MSN

CN = dalexander

CN = Users

In this example, the domain component part of the subject field is not in the last several attributes of the subject field. In this example, Lsass.exe experiences heap corruption.

Example 2:

CN = David Alexander

CN = Users

DC = corp

DC = tailspin

DC = toys

DC = com

In this example, the domain component part of the subject field is in the last several attributes of the subject field. In this example, Lsass.exe does not experience heap corruption.

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Hotfix information
A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required to apply this hotfix.

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.

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

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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

Keywords: kbwinxppresp3fix kbfix kbbug kbhotfixserver kbqfe kbpubtypekc KB895325

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