SpringBoard in Apple iOS before 9 does not properly restrict access to privileged API calls, which allows attackers to spoof the dialog windows of an arbitrary app via a crafted app.
https://support.apple.com/HT205212
http://www.securitytracker.com/id/1033609
http://www.securityfocus.com/bid/76764
http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html