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Ubuntu 16.04 ESM USN-4989-2: BlueZ Local Attack Threat Mitigated

ubuntu
Calendar Grey June 16, 2021
Dist Ubuntu Esm H88
Resolved security flaws in BlueZ for Ubuntu 16.04, mitigating risks of potential local exploit vulnerabilities.
Several security issues were fixed in BlueZ.

Summary

Several security issues were fixed in BlueZ.

Software Description:

- bluez: Bluetooth tools and daemons

Details:

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)

Topics%20covered

Topics Covered

security advisory denial of service update local attack ubuntu bluez

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.

References

https://ubuntu.com/security/notices/USN-4989-2

https://ubuntu.com/security/notices/USN-4989-1

CVE-2020-26558, CVE-2020-27153

Severity
critical
Lowest
Low
Medium
High
Critical

June 16, 2021

Topics%20covered

Topics Covered

security advisory denial of service update local attack ubuntu bluez

Package Information

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