Plugin ID | 237 |
Plugin name | Apache 2.0.35 to 2.0.50 .htaccess environment variables buffer overflow |
Plugin filename | Apache 2.0.35 to 2.0.50 .htaccess environment variables buffer overflow.plugin |
Plugin filesize | 3977 bytes |
Plugin family | HTTP |
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 | 2004/09/16 |
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 | 2.0 |
Plugin changelog | Enhanced the plugin in version 1.1. Corrected the plugin structure and added the accuracy values in 1.2. Added the product produce information in version 1.3. Enhanced the pattern matching in version 2.0 |
Plugin protocol | tcp |
Plugin port | 80 |
Plugin procedure detection | open|send HEAD / HTTP/1.0\n\n|sleep|close|pattern_exists HTTP/1.[0-1] ### *Server: Apache/2.0.[3-4][0-9]* OR HTTP/1.[0-1] ### *Server: Apache/2.0.50* |
Plugin detection accuracy | 80 |
Plugin comment | I am not sure which Apache versions that are affected. http://www.uniras.gov.uk/vuls/2004/403518/ and Secunia are talking about Apache prior 2.0.51 - But the Nessus plugin does only check up to 1.3.31. |
Bug published company | Swedish IT Incident Centre |
Bug published date | 2004/09/15 |
Bug advisory | http://www.uniras.gov.uk/vuls/2004/403518/ |
Bug produced name | Apache Software Foundation |
Bug produced email | apache at apache dot org |
Bug produced web | http://httpd.apache.org |
Bug affected | Apache 2.0.35 to 2.0.50 |
Bug not affected | Apache web servers newer than 2.0.50 or other web servers |
Bug vulnerability class | Denial Of Service |
Bug description | The remote host is running an Apache web server. The installed version is vulnerable to a buffer overflow attack. A local attacker may be able to run arbitrary code with corrupt .htaccess files. The parsing of environment variables seems to be vulnerable to the attack. |
Bug solution | If the web 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. To make it harder to find the server the daemon could be configured to listen at another port (e.g. 8081). Alternation of the application banner can confuse an attacker and let him determine the wrong software. Additionally limit unwanted connections and communications with firewalling. |
Bug fixing time | Approx. 40 minutes |
Bug exploit availability | No |
Bug remote | No |
Bug local | Yes |
Bug severity | Medium |
Bug popularity | 6 |
Bug simplicity | 6 |
Bug impact | 9 |
Bug risk | 7 |
Bug Nessus risk | High |
Source CVE | CAN-2004-0786 |
Source Secunia ID | 12540 |
Source scipID | 844 |
Source Heise News | 51138 |
Source Heise Security | 51138 |
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://xforce.iss.net/xforce/xfdb/17413 |