source: https://www.securityfocus.com/bid/64363/info

Icinga is prone to multiple memory-corruption vulnerabilities due to an off-by-one condition.

Attackers may exploit these issues to gain access to sensitive information or crash the affected application, denying service to legitimate users. 

http://www.example.com/cgi-bin/config.cgi?b=aaaa[..2000 times]