| Plugin ID | 32 |
| Plugin name | Proxy POST port tcp/21 detection |
| Plugin filename | Proxy POST port 21 detection.plugin |
| Plugin filesize | 2543 bytes |
| Plugin family | Firewalls |
| 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 | 2003/11/14 |
| 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 | 2004/11/14 |
| Plugin version | 2.0 |
| Plugin changelog | Corrected the plugin structure and added the accuracy values in 1.3. Improved the pattern matching and introduced the plugin changelog in 2.0 |
| Plugin protocol | tcp |
| Plugin port | 80 |
| Plugin procedure detection | open|send POST http://www.computec.ch:21/ HTTP/1.0\n\n|sleep|close|pattern_exists HTTP/#.# 200 * |
| Plugin detection accuracy | 90 |
| Plugin comment | This plugin was written with the ATK Attack Editor. |
| Bug affected | Some web proxies |
| Bug vulnerability class | Configuration |
| Bug description | Some proxies allow interactive connections to not directly supported ports with an POST request without content-length tag. |
| Bug solution | Reconfigure your proxy so that only the users of the internal network can use it, and so that it can not connect to dangerous ports (0-1023). |
| Bug fixing time | 20 minutes |
| Bug exploit availability | Yes |
| Bug remote | Yes |
| Bug local | Yes |
| Bug severity | High |
| Bug popularity | 8 |
| Bug simplicity | 7 |
| Bug impact | 7 |
| Bug risk | 7 |
| Bug Nessus risk | High |
| Bug check tools | Nessus is able to do the same check. |
| Source Nessus ID | 10194 |
| 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 |