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AUSCERT External Security Bulletin Redistribution
ESB-2000.012 -- Microsoft Security Bulletin (MS00-005)
Patch Available for "Malformed RTF Control Word" Vulnerability
18 January 2000
Microsoft Corporation has released the following security bulletin
concerning a buffer overflow vulnerability the Rich Text Format (RTF)
reader which ships with Microsoft Windows 95 and 98, and Windows NT 4.0.
A malicious user, sending email to the target machine, could include a
malformed control word in an RTF file attached to the email message,
which may cause the recipient's email program to crash on opening the file
with the default reader.
This vulnerability could be exploited to cause denial of service attacks on
Microsoft has issued a patch which corrects this vulnerability:
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:
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Internet Email: email@example.com
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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