Format string vulnerability in mDNSResponderHelper in Apple Mac OS X 10.5.2 allows local users to execute arbitrary code via format string specifiers in the local hostname.
http://docs.info.apple.com/article.html?artnum=307562
http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
http://secunia.com/advisories/29420
https://exchange.xforce.ibmcloud.com/vulnerabilities/41292
http://www.securitytracker.com/id?1019662
http://www.us-cert.gov/cas/techalerts/TA08-079A.html
http://www.vupen.com/english/advisories/2008/0924/references