[USN-4989-2] BlueZ vulnerabilities
Leonidas S Barbosa
leo.barbosa at canonical.com
Wed Jun 16 14:54:41 UTC 2021
Ubuntu Security Notice USN-4989-2
June 16, 2021
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 ESM
Several security issues were fixed in BlueZ.
- bluez: Bluetooth tools and daemons
USN-4989-1 fixed several vulnerabilities in BlueZ. This update provides
the corresponding update for Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that BlueZ incorrectly checked certain permissions when
pairing. A local attacker could possibly use this issue to impersonate
Jay LV discovered that BlueZ incorrectly handled redundant disconnect MGMT
events. A local attacker could use this issue to cause BlueZ to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-27153)
The problem can be corrected by updating your system to the following
Ubuntu 16.04 ESM:
In general, a standard system update will make all the necessary changes.
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