Stack-based buffer overflow in CFNetwork in Apple iOS before 4 on the iPhone and iPod touch allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors related to URL handling.
https://exchange.xforce.ibmcloud.com/vulnerabilities/59631
http://www.securityfocus.com/bid/41016
http://support.apple.com/kb/HT4435
http://support.apple.com/kb/HT4225
http://lists.apple.com/archives/security-announce/2010/Jun/msg00003.html
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html