261 Kerio MailServer prior 6.0.3 unknown flaw SMTP 2004/10/05 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 Check is inspired by the Nessus plugin (see Nessus ID listed in the sources). Corrected the plugin structure and added the accuracy values in 1.1 tcp 25 open|sleep|close|pattern_exists *220 *Kerio MailServer [0-5].* OR *220 *Kerio MailServer 6.0.[0-2]* 80 This plugin was written with the ATK Attack Editor. http://www.kerio.com/kms_history.html Kerio MailServer prior 6.0.3 Kerio MailServer newer than 6.0.2 Unknown The remote host is running a version of Kerio MailServer prior to 6.0.3. There is an undisclosed flaw in the remote version of this server which might allow an attacker to execute arbitrary code on the remote host. The server should be deactivated or de-installed if not necessary. 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. Upgrade the software to the latest version. Approx. 2 hours No http://www.securityfocus.com/bid/11300/exploit/ Yes Yes High 4 4 9 7 High Nessus is able to do the same check 11300 15404 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.computec.ch