NT LsaLookupSids() DoS Vulnerability

The LsaLookupSids() function (part of the LSA API) in Windows NT 4.0, if passed an invalid argument, can be made to force the LSASS.exe process to crash. Without a functional LSA, the system will be unable to handle logons, logoffs, and most other operations involving user authentication. To restore normal operation, the affected system needs to be rebooted.


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