Untrusted search path vulnerability in opcontrol in OProfile 0.9.1 and earlier allows local users to execute arbitrary commands via a modified PATH that references malicious (1) which or (2) dirname programs. NOTE: while opcontrol normally is not run setuid, a common configuration suggests accessing opcontrol using sudo. In such a context, this is a vulnerability.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10890
http://www.securityfocus.com/bid/16536
http://www.securityfocus.com/archive/1/424325/100/0/threaded