The BlueZ system service in Tizen allows an unprivileged process to partially control Bluetooth or acquire sensitive information, due to improper D-Bus security policy configurations. This affects Tizen before 5.0 M1, and Tizen-based firmwares including Samsung Galaxy Gear series before build RE2.
media.defcon.org/DEF%20CON%2026/DEF%20CON%2026%20presentations/Dongsung%20Kim%20and%20Hyoung%20Kee%20Choi%20-%20Updated/DEFCON-26-Dongsung-Kim-and-Hyoung-Kee-Choi-Your-Watch-Can-Watch-You-Updated.pdf
review.tizen.org/git/?p=platform/upstream/bluez.git%3Ba=commit%3Bh=ff9878c95efc12d4a4495153ab51e3a09f8d3c01
www.youtube.com/watch?v=3IdgBwbOT-g&feature=youtu.be