The DoCommand function in jhead.c in Matthias Wandel jhead 2.84 and earlier allows local users to delete arbitrary files via vectors involving a modified input filename in which (1) a final "z" character is replaced by a "t" character or (2) a final "t" character is replaced by a "z" character.
https://bugs.launchpad.net/ubuntu/+source/jhead/+bug/271020
http://www.securityfocus.com/bid/32506