CVE-2021-3658

Related Vulnerabilities: CVE-2021-3658  

bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.

Description

bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and restores it when powered up. If a device is powered down while discoverable, it will be discoverable when powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby attackers.

Mitigation

If bluetooth is disabled or never powered on, this vulnerability is not exposed.

Additional Information

  • Bugzilla 1984728: CVE-2021-3658 bluez: adapter incorrectly restores Discoverable state after powered down
  • CWE-863: Incorrect Authorization
  • FAQ: Frequently asked questions about CVE-2021-3658