Lock Screen in Apple iOS before 7.1.2 does not properly manage the telephony state in Airplane Mode, which allows physically proximate attackers to bypass the lock protection mechanism, and access a certain foreground application, via unspecified vectors.
http://www.securitytracker.com/id/1030500
http://www.securityfocus.com/bid/68276
http://archives.neohapsis.com/archives/bugtraq/2014-06/0174.html