[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

bluez vulnerabilities

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

- Ubuntu 16.04 ESM


Several security issues were fixed in BlueZ.

Software Description:
- 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
 devices. (CVE-2020-26558)

 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)

Update instructions:

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

Ubuntu 16.04 ESM:
  bluez                           5.37-0ubuntu5.3+esm1
  libbluetooth3                   5.37-0ubuntu5.3+esm1

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

  CVE-2020-26558, CVE-2020-27153
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20210616/29a1e8ba/attachment.sig>

More information about the ubuntu-security-announce mailing list