Buffer overflow in CGI scripts in Nagios 1.x before 1.4 and 2.x before 2.3 allows remote attackers to execute arbitrary code via a negative content length (Content-Length) HTTP header.
https://sourceforge.net/mailarchive/forum.php?thread_id=10297806&forum_id=7890
https://exchange.xforce.ibmcloud.com/vulnerabilities/26253
http://www.vupen.com/english/advisories/2006/1662
http://www.securityfocus.com/bid/17879
http://www.novell.com/linux/security/advisories/2006_05_19.html
http://www.nagios.org/development/changelog.php
http://www.gentoo.org/security/en/glsa/glsa-200605-07.xml
http://www.debian.org/security/2006/dsa-1072
http://secunia.com/advisories/20247
http://secunia.com/advisories/20215
http://secunia.com/advisories/20013