Unsuccessful Authentication Causes a Memory Leak in the Kerberos Component of Lsass.exe (814569)


The information in this article applies to:

  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP1

SYMPTOMS

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.

CAUSE

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.

RESOLUTION

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 fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

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

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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

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 Microsoft Windows 2000 Service Pack 4.

MORE INFORMATION

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

Modification Type:MinorLast Reviewed:10/11/2005
Keywords:kbHotfixServer kbQFE kbSecurity kbWin2kSP4fix kbWin2000preSP4Fix kbfix kbbug KB814569
©2004 Microsoft Corporation. All rights reserved.