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.
https://exchange.xforce.ibmcloud.com/vulnerabilities/96076
http://www.securitytracker.com/id/1030866
http://www.securityfocus.com/bid/69903
http://www.securityfocus.com/bid/69882
http://support.apple.com/kb/HT6443
http://support.apple.com/kb/HT6442
http://support.apple.com/kb/HT6441
http://secunia.com/advisories/61318
http://archives.neohapsis.com/archives/bugtraq/2014-09/0107.html
http://archives.neohapsis.com/archives/bugtraq/2014-09/0106.html