The GeoServices component in Apple iOS before 10 and watchOS before 3 does not properly restrict access to PlaceData information, which allows attackers to discover physical locations via a crafted application.
lists.apple.com/archives/security-announce/2016/Sep/msg00004.html
lists.apple.com/archives/security-announce/2016/Sep/msg00008.html
lists.apple.com/archives/security-announce/2016/Sep/msg00010.html
www.securityfocus.com/bid/92932
www.securityfocus.com/bid/92933
www.securitytracker.com/id/1036797
support.apple.com/HT207141
support.apple.com/HT207143