Unsuccessful Authentication Causes a Memory Leak in the Kerberos Component of Lsass.exe

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Article ID: 814569 - View products that this article applies to.
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Private Lsass.exe bytes on a client computer may be leaking. When this occurs, you see private bytes increase steadily over time. You also see that the value in the VM Size column in Task Manager increases each time that access is denied when you try to connect to a remote print server or to view the resources on a remote server.


The leak occurs because resources are not released when Kerberos authentication does not succeed. Authentication might not succeed if the client computer's time and the server's time are not synchronized with the domain controller.


Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack

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.

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, submit a request to 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:
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. The English version of this fix has the file attributes (or later) 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 tool in Control Panel.
   Date         Time   Size           Version  File name
   16-Feb-2003  13:30  5.0.2195.6613  124,176  Adsldp.dll
   16-Feb-2003  13:30  5.0.2195.6601  130,832  Adsldpc.dll
   24-Feb-2003  13:15  5.0.2195.6667   62,736  Adsmsext.dll
   16-Feb-2003  13:30  5.0.2195.6660  377,616  Advapi32.dll
   16-Feb-2003  13:30  5.0.2195.6611   49,936  Browser.dll
   16-Feb-2003  13:30  5.0.2195.6663  135,952  Dnsapi.dll
   16-Feb-2003  13:30  5.0.2195.6663   96,528  Dnsrslvr.dll
   16-Feb-2003  13:30  5.0.2195.6661   46,352  Eventlog.dll
   16-Feb-2003  13:30  5.0.2195.6627  148,240  Kdcsvc.dll
   20-Feb-2003  13:11  5.0.2195.6666  204,560  Kerberos.dll
   02-Dec-2002  16:09  5.0.2195.6621   71,888  Ksecdd.sys
   24-Jan-2003  11:40  5.0.2195.6659  509,712  Lsasrv.dll
   24-Jan-2003  11:41  5.0.2195.6659   33,552  Lsass.exe
   05-Feb-2003  05:59  5.0.2195.6662  109,328  Msv1_0.dll
   16-Feb-2003  13:30  5.0.2195.6601  312,592  Netapi32.dll
   16-Feb-2003  13:30  5.0.2195.6627  360,720  Netlogon.dll
   24-Feb-2003  13:15  5.0.2195.6669  929,552  Ntdsa.dll
   24-Feb-2003  13:15  5.0.2195.6666  392,464  Samsrv.dll
   16-Feb-2003  13:30  5.0.2195.6622  112,912  Scecli.dll
   16-Feb-2003  13:30  5.0.2195.6625  305,936  Scesrv.dll
   10-Feb-2003  12:22  5.0.2195.6663  166,912  Sp3res.dll
   16-Feb-2003  13:30  5.0.2195.6601   51,472  W32time.dll
   16-Aug-2002  02:32  5.0.2195.6601   57,104  W32tm.exe
   24-Feb-2003  13:15  5.0.2195.6666  125,200  Wldap32.dll


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 Microsoft Windows 2000 Service Pack 4.


To troubleshoot a scenario under which the leak may occur, create a batch file that repeatedly runs a "net view" command against the server. The "net view" commands do not succeed and generate "Access denied" messages. The value of the VM Size column in Task Manager steadily increases; more than 10 megabytes (MB) may leak in 10 minutes.

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server Product


Article ID: 814569 - Last Review: February 27, 2014 - Revision: 2.8
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Service Pack 3
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Service Pack 3
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP1
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbqfe kbsecurity kbwin2ksp4fix kbwin2000presp4fix kbfix kbbug KB814569

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