Mandriva Linux Security Advisory 2013-252 – A non-privileged user who was able to run jobs or login to a node which ran pbs_server or pbs_mom, could submit arbitrary jobs to a pbs_mom daemon to queue and run the job, which would run as root…. Mandriva Linux Security Advisory 2013-252 – A non-privileged user who was able to run jobs or login to a node which ran pbs_server or pbs_mom, could submit arbitrary jobs to a pbs_mom daemon to queue and run the job, which would run as root.

Read more http://packetstormsecurity.com/files/123677/MDVSA-2013-252.txt