Microsoft KB Archive/228467

= Access Violation in Lsass.exe When Passing a Null Pointer =

Article ID: 228467

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q228467



SYMPTOMS
Lsass.exe may cause an access violation when you run third-party security programs that attempt denial of service attacks. After the access violation, you cannot log on locally and the administrative tools that rely on Local Security Authority (LSA) or LSARPC do not function correctly.



CAUSE
The NetUserEnum API enumerates all of the user, machine, and group accounts from a security account manager (SAM) database. This function calls an internal API passing a NULL value for one of the parameters. This null value causes the access violation in Lsass.exe.



Windows NT Server or Workstation 4.0
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/windows/servicepacks/ -or-


 * 152734 how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

Windows NT Server 4.0, Terminal Server Edition
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.

Additional query words: sp4

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB228467

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