| Plugin ID | 114 |
| Plugin name | Ipswitch WS_FTP Server prior 5.0.2 CWD path denial of service |
| Plugin filename | Ipswitch WS_FTP Server prior 5.0.2 CWD path denial of service.plugin |
| Plugin filesize | 3836 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 | 2004/09/01 |
| 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 | 21 |
| Plugin procedure detection | open|sleep|close|pattern_exists *WS_FTP Server [0-4].* OR *WS_FTP Server 5.0.[0-2]* |
| Plugin procedure exploit | open|sleep|send USER ftp\n|sleep|send PASS test@localhost\n|sleep|send cd a../a\n|sleep|close|pattern_exists * |
| Plugin detection accuracy | 80 |
| Plugin exploit accuracy | 98 |
| Plugin comment | This plugin was written with the ATK Attack Editor. |
| Bug published name | lion |
| Bug published email | lion at cnhonker dot net |
| Bug published web | http://www.cnhonker.com |
| Bug published date | 2004/08/30 |
| Bug advisory | http://packetstormsecurity.org/0408-advisories/wsFTP-DoS.txt |
| Bug affected | Ipswitch WS_FTP Server prior 5.0.2 |
| Bug not affected | Ipswitch WS_FTP Server newer than 5.0.2 or other ftp servers |
| Bug vulnerability class | Denial Of Service |
| Bug description | The Ipswitch WS_FTP Server is a well-known ftp server for Windows operating systems. lion published a denial of service vulnerability in the version prior 5.0.2. So it is possible to increase the CPU usage of the server with the wrong path command "cd a../a". An user account is required to exploit this flaw. |
| 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 (http://www.ipswitch.com/Products/WS_FTP-Server/). Additionally limit unwanted connections and communications with firewalling. |
| Bug fixing time | Approx. 20 minutes |
| Bug exploit availability | Yes |
| Bug exploit url | http://packetstormsecurity.org/0408-advisories/wsFTP-DoS.txt |
| Bug remote | Yes |
| Bug local | Yes |
| Bug severity | Medium |
| Bug popularity | 7 |
| Bug simplicity | 8 |
| Bug impact | 7 |
| Bug risk | 7 |
| Bug check tools | The Attack Tool Kit provides an exploit and an detection plugin. |
| Source CVE | CVE-1999-0362 |
| Source SecurityFocus BID | 217 |
| Source OSVDB ID | 937 |
| Source Secunia ID | 12406 |
| Source scipID | 814 |
| Source Nessus ID | 14586 |
| 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 |