Springboard in Apple iOS before 8.1.3 does not properly validate signatures when determining whether to solicit an app trust decision from the user, which allows attackers to bypass intended first-launch restrictions by leveraging access to an enterprise distribution certificate for signing a crafted app.
http://www.securitytracker.com/id/1031652
http://support.apple.com/HT204245
http://lists.apple.com/archives/security-announce/2015/Jan/msg00001.html