| Plugin ID | 212 |
| Plugin name | Cat Soft Serv-U FTP server prior 2.5i CWD ..%20 directory traversal |
| Plugin filename | Cat Soft Serv-U FTP server prior 2.5i CWD ..-20 directory traversal.plugin |
| Plugin filesize | 3479 bytes |
| Plugin family | FTP |
| 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 | 2004/09/13 |
| 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 | 1.1 |
| Plugin changelog | Corrected the plugin structure and added the accuracy values in 1.1 |
| Plugin protocol | tcp |
| Plugin port | 21 |
| Plugin procedure detection | open|sleep|close|pattern_exists 220 Serv-U FTP-Server v2.[0-5]* OR *to /..* OR *to /[a-z]:/* OR *550 /[a-z]:/.* |
| Plugin detection accuracy | 99 |
| Plugin comment | This plugin may be very accurate if not just the banner is analyzed. |
| Bug published name | Zoa_Chien |
| Bug published email | zoachien at securax dot org |
| Bug published web | http://www.securax.org |
| Bug published company | securax.org |
| Bug published date | 2000/12/05 |
| Bug advisory | http://www.securityfocus.com/archive/1/148905 |
| Bug affected | Serv-U FTP server prior 2.5i |
| Bug not affected | Serv-U FTP server newer than 2.5i or other ftp servers |
| Bug vulnerability class | Directory Traversal |
| Bug description | The Serv-U FTP server is a well-known ftp server for Windows operating systems. It is possible to break out of the remoteFTP chroot by appending %20s in the CWD command. |
| Bug solution | If the ftp server is not used it should be de-installed or de-activated. Install the newest patch or bugfix to solve the problem or upgrade to the latest software version which is not vulnerable anymore. Additionally limit unwanted connections and communications with firewalling. |
| Bug fixing time | Approx. 20 minutes |
| Bug exploit availability | Yes |
| Bug exploit url | http://www.securityfocus.com/bid/2052/exploit/ |
| Bug remote | Yes |
| Bug local | Yes |
| Bug severity | Medium |
| Bug popularity | 7 |
| Bug simplicity | 8 |
| Bug impact | 8 |
| Bug risk | 7 |
| Bug Nessus risk | High |
| Bug check tools | Nessus is able to same check. The attack is very well documented in the original Bugtraq posting. |
| Source CVE | CVE-2001-0054 |
| Source SecurityFocus BID | 2052 |
| Source Nessus ID | 10565 |
| 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.securityfocus.com/archive/1/149180 |