Apple Mac OS X AppleTalk allows local users to cause a denial of service (kernel panic) by calling the AIOCREGLOCALZN ioctl command with a crafted data structure on an AppleTalk socket.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30552
http://www.vupen.com/english/advisories/2007/0930
http://www.vupen.com/english/advisories/2006/4746
http://www.us-cert.gov/cas/techalerts/TA07-072A.html
http://www.securitytracker.com/id?1017751
http://www.securityfocus.com/bid/21317
http://secunia.com/advisories/24479
http://secunia.com/advisories/23134
http://lists.apple.com/archives/security-announce/2007/Mar/msg00002.html