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              AUSCERT External Security Bulletin Redistribution
                             
                 ESB-1999.085 -- MS99-020 Security Bulletin
          Patch Available for "Malformed LSA Request" Vulnerability
                                24 June 1999

===========================================================================

Microsoft Corporation has released the following security bulletin
concerning a vulnerability in Windows NT where a malformed request to the
Local Security Authority (LSA) service may cause the service to stop
responding and require the system to be restarted. This vulnerability
could be exploited to mount denial of service attacks:

       http://www.microsoft.com/security/bulletins/ms99-020.asp

===========================================================================

This security bulletin is provided as a service to AusCERT's members.
As AusCERT did not write the document referenced above, AusCERT has
had no control over its content.  The decision to use any or all
of this information is the responsibility of each user or organisation,
and should be done so in accordance with site policies and procedures.

If you have any questions or need further information, please contact 
Microsoft Corporation directly.

Previous advisories and external security bulletins can be retrieved from:

	http://www.auscert.org.au/Information/advisories.html

If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).

Internet Email: auscert@auscert.org.au
Facsimile:	(07) 3365 7031
Telephone:	(07) 3365 4417 (International: +61 7 3365 4417)
		AusCERT personnel answer during Queensland business hours
		which are GMT+10:00 (AEST).
		On call after hours for emergencies.

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