Buffer overflow in the IPsec component in Apple iOS before 6 allows remote attackers to execute arbitrary code via a crafted racoon configuration file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/78710
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-3674
http://support.apple.com/kb/HT5503
http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html