259 Apache 2.0.51 Satisfy directive access control bypass HTTP 2004/09/27 Marc Ruef marc dot ruef at computec dot ch http://www.computec.ch computec.ch Marc Ruef marc dot ruef at computec dot ch http://www.computec.ch computec.ch 2004/11/14 2.0 Corrected the plugin structure and added the accuracy values in 1.1. Improved the pattern matching and introduced the plugin changelog in 2.0 tcp 80 open|send HEAD / HTTP/1.0\n\n|sleep|close|pattern_exists HTTP/1.[0-1] ### *Server: Apache/2.0.51* 80 This plugin was written with the ATK Attack Editor. editors at apacheweek dot com http://www.apacheweek.com Apache Week 2004/09/23 http://www.apacheweek.com/issues/04-09-23#dev Apache Software Foundation apache at apache dot org http://httpd.apache.org Apache 2.0.51 Apache other than 2.0.51 (e.g. 2.0.51-dev) or other web server products Evasion The remote host is running an Apache web server 2.0.51. This specific version is vulnerable to a bypass attack. Under special circumstances an attacker may gain elevated access privileges if the Satisfy directive is used. No further technical details are available at the moment. If the web server and/or the Satisfy directive 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. Approx. 30 minutes Maybe Yes Yes Medium 6 6 7 6 CAN-2004-0811 12633 852 Hacking Exposed: Network Security Secrets & Solutions, Stuart McClure, Joel Scambray and George Kurtz, February 25, 2003, 4th Edition, McGraw-Hill Osborne Media, ISBN 0072227427 http://httpd.apache.org/download.cgi