On Fitbit activity-tracker devices, certain addresses never change. According to the popets-2019-0036.pdf document, this leads to "permanent trackability" and "considerable privacy concerns" without a user-accessible anonymization feature. The devices, such as Charge 2, transmit Bluetooth Low Energy (BLE) advertising packets with a TxAdd flag indicating random addresses, but the addresses remain constant. If devices come within BLE range at one or more locations where an adversary has set up passive sniffing, the adversary can determine whether the same device has entered one of these locations.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-07-15T12:47:25

Updated: 2024-08-06T14:02:38.299Z

Reserved: 2019-07-15T00:00:00

Link: CVE-2014-10374

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-07-15T13:15:10.967

Modified: 2024-11-21T02:03:28.753

Link: CVE-2014-10374

cve-icon Redhat

No data.