==========================================================================
Ubuntu Security Notice USN-4311-1
March 30, 2020

bluez vulnerabilities
==========================================================================

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

– Ubuntu 19.10
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in BlueZ.

Software Description:
– bluez: Bluetooth tools and daemons

Details:

It was discovered that BlueZ incorrectly handled bonding HID and HOGP
devices. A local attacker could possibly use this issue to impersonate
non-bonded devices. (CVE-2020-0556)

It was discovered that BlueZ incorrectly handled certain commands. 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 16.04 LTS. (CVE-2016-7837)

Update instructions:

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

Ubuntu 19.10:
bluez 5.50-0ubuntu5.1
libbluetooth3 5.50-0ubuntu5.1

Ubuntu 18.04 LTS:
bluez 5.48-0ubuntu3.4
libbluetooth3 5.48-0ubuntu3.4

Ubuntu 16.04 LTS:
bluez 5.37-0ubuntu5.3
libbluetooth3 5.37-0ubuntu5.3

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

References:
https://usn.ubuntu.com/4311-1
CVE-2016-7837, CVE-2020-0556

Package Information:
https://launchpad.net/ubuntu/+source/bluez/5.50-0ubuntu5.1
https://launchpad.net/ubuntu/+source/bluez/5.48-0ubuntu3.4
https://launchpad.net/ubuntu/+source/bluez/5.37-0ubuntu5.3

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