Integer overflow in CoreGraphics in Apple iOS before 8 and Apple TV before 7 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted PDF document.
http://archives.neohapsis.com/archives/bugtraq/2014-09/0106.html
http://archives.neohapsis.com/archives/bugtraq/2014-09/0107.html
http://secunia.com/advisories/61318
http://support.apple.com/kb/HT6441
http://support.apple.com/kb/HT6442
http://support.apple.com/kb/HT6443
http://www.securityfocus.com/bid/69882
http://www.securityfocus.com/bid/69903