Operating System:

Published:

20 May 1999

Protect yourself against future threats.

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              AUSCERT External Security Bulletin Redistribution

                    ESB-1999.064 -- MS99-016 Security Bulletin
        Patch Available for "Malformed Phonebook Entry" Vulnerability
                              21 May 1999

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Microsoft Corporation has released the following security bulletin
concerning a buffer overrun vulnerability in the Microsoft Windows
NT remote access service (RAS) client. This vulnerability could
allow a denial-of-service attack to be mounted against the client
machine or, under certain conditions, could allow arbitrary code
to be executed on that machine.  The attacker must have permission
to add or modify phonebook entries in order to mount the attack
(Permissions can be set via the phonebook's ACL). This vulnerability
affects RAS clients not servers:

       http://www.microsoft.com/security/bulletins/ms99-016.asp



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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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