poppassd in Qualcomm qpopper 4.0.8 allows local users to modify arbitrary files and gain privileges via the -t (trace file) command line argument.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-3098
http://www.vupen.com/english/advisories/2005/1844
http://www.securityfocus.com/bid/14944