A vulnerability exists in the SMTP service installed by default on Microsoft Windows 2000 Server (and optionally on Windows 2000 professional) that could allow an intruder to use the service to send mail.
The Simple Mail Transfer Protocol (SMTP) is the standard protocol used to transport mail across the Internet. Microsoft Windows 2000 Server contains an SMTP server that requires authentication before users are permitted to send mail. A flaw in the way the server handles authentication could permit an intruder to use the service to send mail without providing genuine credentials.
For more information, see Microsoft security bulletin MS01-037.
Intruders may be able to send mail through a vulnerable server in violation of local security policies.
The CERT/CC is currently unaware of a general purpose solution to this problem without strong digital signatures on all mail messages. To address the specific problem in the Microsoft SMTP server, apply a patch as described in MS01-037.
This document was written by Shawn V. Hernan.
|Date First Published:||2001-08-18|
|Date Last Updated:||2001-08-18 03:00 UTC|