The nagios CGI scripts did not sufficiently check the validity of the HTTP Content-Length attribute. By sending a specially crafted HTTP request with an invalidly large Content-Length value to the Nagios server, a remote attacker could exploit this to execute arbitrary code with web server privileges.
Please note that the Apache 2 web server already checks for valid Content-Length values, so installations using Apache 2 (the only web server officially supported in Ubuntu) are not vulnerable to this flaw.
29 May 2006
A security issue affects these releases of Ubuntu and its derivatives:
The nagios CGI scripts did not sufficiently check the validity of the HTTP Content-Length attribute. By sending a specially crafted HTTP request with an invalidly large Content-Length value to the Nagios server, a remote attacker could exploit this to execute arbitrary code with web server privileges.
Please note that the Apache 2 web server already checks for valid Content-Length values, so installations using Apache 2 (the only web server officially supported in Ubuntu) are not vulnerable to this flaw.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
Vulmon