| Plugin ID | 310 |
| Plugin name | Apache prior 1.3.31 and prior 2.0.49 connection blocking denial of service |
| Plugin filename | Apache prior 1.3.31 and prior 2.0.49 connection blocking denial of service.plugin |
| Plugin filesize | 3040 bytes |
| Plugin family | HTTP |
| Plugin created name | Marc Ruef |
| Plugin created email | marc.ruef at computec.ch |
| Plugin created web | http://www.computec.ch |
| Plugin created company | computec.ch |
| Plugin created date | 2005/01/05 |
| Plugin version | 1.0 |
| Plugin protocol | tcp |
| Plugin port | 80 |
| Plugin procedure detection | open|sleep|close|pattern_exists|open|send HEAD / HTTP/1.0\n\n|sleep|close|pattern_exists HTTP/#.# ###*Server: Apache*1.[0-2].* OR HTTP/#.# ###*Server: Apache*1.3.[0-2]* OR HTTP/#.# ###*Server: Apache*1.3.3[0-1]* OR HTTP/#.# ###*Server: Apache*2.0.[0-3]* OR HTTP/#.# ###*Server: Apache*2.0.4[0-9]* |
| Plugin detection accuracy | 85 |
| Plugin comment | The NASL script is Copyright (C) 2004 Scott Shebby |
| Bug produced name | Apache Software Foundation |
| Bug produced email | apache at apache dot org |
| Bug produced web | http://httpd.apache.org |
| Bug affected | Apache prior 1.3.31 and prior 2.0.49 |
| Bug not affected | Apache prior 1.3.31 and prior 2.0.49 on Linux and FreeBSD, newer versions or other web server solutions. |
| Bug vulnerability class | Denial Of Service |
| Bug false positives | This script is not able to detect if the target host is running Linux or FreeBSD. |
| Bug description | The remote web server appears to be running a version of Apache that is less that 2.0.49 or 1.3.31. These versions are vulnerable to a denial of service attack where a remote attacker can block new connections to the server by connecting to a listening socket on a rarely accessed port. |
| Bug solution | Upgrade to Apache 2.0.49 or 1.3.31. |
| Bug fixing time | Approx. 20 minutes |
| Bug exploit availability | Maybe |
| Bug exploit url | http://www.securityfocus.com/bid/9921/exploit/ |
| Bug remote | Yes |
| Bug local | Yes |
| Bug severity | Medium |
| Bug popularity | 6 |
| Bug simplicity | 7 |
| Bug impact | 7 |
| Bug risk | 7 |
| Bug check tools | Nessus can check this flaw with the plugin 12280 (Apache Connection Blocking Denial of Service). |
| Source CVE | CAN-2004-0174 |
| Source SecurityFocus BID | 9921 |
| Source Nessus ID | 12280 |
| 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 |