Access Violation in Lsass.exe When Passing a Null Pointer

ID: Q228467

The information in this article applies to:

Microsoft Windows NT Server, Enterprise Edition version 4.0
Microsoft Windows NT Workstation version 4.0
Microsoft Windows NT Server version 4.0

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.

RESOLUTION

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/

Q152734 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://www.microsoft.com/support/supportnet/overview/overview.asp

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was first corrected in Windows NT 4.0 Service Pack 6.

Additional query words: sp4

Keywords : kbbug4.00 kbfix4.00
Version : winnt:4.0
Platform : winnt
Issue type : kbbug