Buggyzilla.pl exploits two vulnerabilities in bugzilla 2.14 or prior in order to execute commands on affected systems. This uses bad quotation of user input in bugzilla to gain access to administrator pages. The a weakness in the reports.cgi is then used to allow execution of commands. Advisory available here.
3e2376615b934217d9ee3fabfaf8b0934c68e5e806151b15baa23d51a10793ba