165 SMTP spam filter test SMTP 2004/09/07 Marc Ruef marc dot ruef at computec dot ch http://www.computec.ch computec.ch Marc Ruef marc dot ruef at computec dot ch http://www.computec.ch computec.ch 2004/11/13 1.1 Corrected the plugin structure and added the accuracy values in 1.1 tcp 25 open|sleep|send HELO atk.test\n|sleep|send MAIL FROM:\n|sleep|send RCPT TO:\n|sleep|send DATA\n|sleep|send Date: 11 Feb 2081 11:02:11\n|send From: ATKPLUGIN165\n|send Subject: This is a spam mail test by the Attack Tool Kit Plugin 165 ооо\n\n|send Buy Viagra. Free shipping. Sex and XXX teens now!!! click here 123457890\n|send .\n|sleep|send QUIT\n|close|pattern_exists *250 * 80 This plugin was written with the ATK Attack Editor. Jonathan B. Postel (+) http://www.isoc.org/postel/ Information Sciences Institute, University of Southern California 1982/08/01 http://www.faqs.org/rfcs/rfc821.html Open smtp relays Closed smtp relays (e.g. no anonymous mails or authentication required) Configuration The remote host is running a SMTP mail relay. This one could be used to send emails. It may also be possible to specify wrong sender addresses - This could be used to send spam or junk mail. The server should be deactivated or de-installed if not necessary. Do not allow everyone to send emails over your mail relay. And do not allow arbitrary sender addresses to be specified. To make it harder to find the server the daemon could be configured to listen at another port (e.g. 8025). Try to prevent unwanted connection attempts by filtering traffic with firewalling. Alternation of the application banner can confuse an attacker and let him determine the wrong software. Approx. 2 hours Yes http://www.securityfocus.com/bid/6118/exploit/ Yes Yes Medium 9 7 7 7 Low/Medium Most vulnerability scanners are able to do a similar check. CAN-1999-0512 6118 10262 Hacking Exposed: Network Security Secrets & Solutions, Stuart McClure, Joel Scambray and George Kurtz, February 25, 2003, 4th Edition, McGraw-Hill Osborne Media, ISBN 0072227427 http://www.cs.cf.ac.uk/Dave/PERL/node175.html