| Plugin ID | 82 |
| Plugin name | Mercur SMTP-Server 3.3 to 4.2 control service buffer overflow |
| Plugin filename | Mercur SMTP-Server 3.3 to 4.2 control service buffer overflow.plugin |
| Plugin filesize | 3124 bytes |
| Plugin family | SMTP |
| Plugin created name | Marc Ruef |
| Plugin created email | marc dot ruef at computec dot ch |
| Plugin created web | http://www.computec.ch |
| Plugin created company | computec.ch |
| Plugin created date | 2004/03/23 |
| Plugin updated name | Marc Ruef |
| Plugin updated email | marc dot ruef at computec dot ch |
| Plugin updated web | http://www.computec.ch |
| Plugin updated company | computec.ch |
| Plugin updated date | 2004/11/13 |
| Plugin version | 1.2 |
| Plugin changelog | Corrected the plugin structure and added the accuracy values in 1.2 |
| Plugin protocol | tcp |
| Plugin port | 25 |
| Plugin procedure detection | open|sleep|close|pattern_exists 220 *MERCUR SMTP-Server (v3.3* OR 220 *MERCUR SMTP-Server (v4.0* OR 220 *MERCUR SMTP-Server (v4.2* |
| Plugin detection accuracy | 80 |
| Plugin comment | This plugin was written with the ATK Attack Editor. |
| Bug advisory | http://www.securityfocus.com/archive/1/282988 |
| Bug affected | Mercur SMTP-Server 3.3 to 4.2 |
| Bug not affected | Mercur SMTP-Server 4.2 and newer |
| Bug vulnerability class | Buffer Overflow |
| Bug description | The Mercur Mailserver is a small Mail Transfer Agent (MTA). It has been reported that there is an insufficient bounds checking in the Control-Service component, which listens on TCP port 32000 by default. An attacker may use this buffer overflow by sending an very long username/password to run arbritrary code with the server privileges. |
| Bug solution | It may be possible that there is a new software version available. At the moment the vulnerability is only reported for MERCUR Mailserver 3.3 to 4.2. Please visit the web site of Atrium Software at http://www.atrium-software.com/mercur/mercur_e.html. Limit unwanted connections and communications with firewalling. |
| Bug fixing time | 1 hour |
| Bug exploit availability | Yes |
| Bug exploit url | http://www.securityfocus.com/data/vulnerabilities/exploits/mercrexp.c |
| Bug remote | Yes |
| Bug local | Yes |
| Bug severity | Medium |
| Bug popularity | 5 |
| Bug simplicity | 8 |
| Bug impact | 9 |
| Bug risk | 6 |
| Source CVE | CAN-2002-1073 |
| Source SecurityFocus BID | 5261 |
| Source Literature | Hacking Exposed: Network Security Secrets & Solutions, Stuart McClure, Joel Scambray and George Kurtz, February 25, 2003, 4th Edition, McGraw-Hill Osborne Media, ISBN 0072227427 |
| Source Misc. | http://www.computec.ch |