Heap-based buffer overflow in the GSM mobility management implementation in Telephony in Apple iOS before 4.2 on the iPhone and iPad allows remote attackers to execute arbitrary code on the baseband processor via a crafted Temporary Mobile Subscriber Identity (TMSI) field.
https://exchange.xforce.ibmcloud.com/vulnerabilities/63421
http://www.vupen.com/english/advisories/2010/3046
http://www.securitytracker.com/id?1024770
http://support.apple.com/kb/HT4456
http://secunia.com/advisories/42314
http://lists.apple.com/archives/security-announce/2010//Nov/msg00003.html