Apple iOS could allow a remote attacker to obtain sensitive information, caused by a bug that allows access to the front-facing video camera and microphone in the FaceTime component. By placing a video call, then adding yourself to the group call, an attacker could exploit this vulnerability to listen to soundbites of any iPhone user’s ongoing conversation without them ever picking up the call.
Apple has said “We’re aware of this issue and we have identified a fix that will be released in a software update later this week”
Update : Apple has now disabled the group FaceTime feature pending the fix. Group FaceTime is listed as “temporarily unavailable,” per this support page.