==========================================================Ubuntu Security Notice USN-287-1 May 29, 2006
A security issue affects the following Ubuntu releases:
The problem can be corrected by upgrading the affected package to
version 2:1.3-0+pre6ubuntu0.2 (for Ubuntu 5.04), or
2:1.3-cvs.20050402-4ubuntu3.2 (for Ubuntu 5.10). In general, a
standard system upgrade is sufficient to effect the necessary changes.
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