The shadow database feature (syncshadowdb) in Bugzilla 2.9 through 2.16.10 allows local users to overwrite arbitrary files via a symlink attack on temporary files.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=329387
secunia.com/advisories/18218
secunia.com/advisories/22826
securityreason.com/securityalert/302
securitytracker.com/id?1015411
www.debian.org/security/2006/dsa-1208
www.securityfocus.com/archive/1/420353/100/0/threaded
www.securityfocus.com/bid/16061
bugzilla.mozilla.org/show_bug.cgi?id=305353
exchange.xforce.ibmcloud.com/vulnerabilities/23863