=========================================================================Ubuntu Security Notice USN-5481-1
June 15, 2022

bluez vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in BlueZ.

Software Description:
- bluez: Bluetooth tools and daemons

Details:

It was discovered that BlueZ incorrectly validated certain capabilities
and lengths when handling the A2DP profile. A remote attacker could use
this issue to cause BlueZ to crash, resulting in a denial of service, or
possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  bluez                           5.53-0ubuntu3.6
  libbluetooth3                   5.53-0ubuntu3.6

Ubuntu 18.04 LTS:
  bluez                           5.48-0ubuntu3.9
  libbluetooth3                   5.48-0ubuntu3.9

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5481-1
  https://launchpad.net/bugs/1977968

Package Information:
  https://launchpad.net/ubuntu/+source/bluez/5.53-0ubuntu3.6
  https://launchpad.net/ubuntu/+source/bluez/5.48-0ubuntu3.9