statuswml.cgi in Nagios before 3.1.1 allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) ping or (2) Traceroute parameters.
http://www.vupen.com/english/advisories/2010/0750
http://www.ubuntu.com/usn/USN-795-1
http://www.securitytracker.com/id?1022503
http://www.nagios.org/development/history/core-3x/
http://www.debian.org/security/2009/dsa-1825
http://security.gentoo.org/glsa/glsa-200907-15.xml
http://secunia.com/advisories/39227
http://secunia.com/advisories/35692
http://secunia.com/advisories/35688