CVE-2021-3658

Publication date 28 July 2021

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
bluez 22.04 LTS jammy
Not affected
21.10 impish
Fixed 5.60-0ubuntu2.1
21.04 hirsute
Fixed 5.56-0ubuntu4.3
20.04 LTS focal
Fixed 5.53-0ubuntu3.4
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

Notes


mdeslaur

probably introduced by this commit: https://github.com/bluez/bluez/commit/d04eb02f9bad8795297210ef80e262be16ea8f07 so bionic and older aren't vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
bluez

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-5155-1
    • BlueZ vulnerabilities
    • 23 November 2021

Other references