Apple Mac OS X before 10.5 uses weak permissions for the User Template directory, which allows local users to gain privileges by inserting a Trojan horse file into this directory.
https://exchange.xforce.ibmcloud.com/vulnerabilities/43496
http://www.vupen.com/english/advisories/2008/1981/references
http://www.securityfocus.com/bid/30018
http://support.apple.com/kb/HT2163
http://securitytracker.com/id?1020394
http://secunia.com/advisories/30802
http://lists.apple.com/archives/security-announce/2008//Jun/msg00002.html