USN-4989-1: BlueZ vulnerabilities
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) Ziming Zhang discovered that BlueZ incorrectly handled certain array indexes. A local attacker could use this issue to cause BlueZ to crash, resulting in a denial of service, or possibly obtain sensitive information. This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10. (CVE-2021-3588)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/libbluetooth3to a version that resolves this vulnerability.Fixed in 5.56-0ubuntu4.1 - Upgrade
Upgrade
ubuntu/bluezto a version that resolves this vulnerability.Fixed in 5.56-0ubuntu4.1 - Upgrade
Upgrade
ubuntu/libbluetooth3to a version that resolves this vulnerability.Fixed in 5.55-0ubuntu1.2 - Upgrade
Upgrade
ubuntu/bluezto a version that resolves this vulnerability.Fixed in 5.55-0ubuntu1.2 - Upgrade
Upgrade
ubuntu/libbluetooth3to a version that resolves this vulnerability.Fixed in 5.53-0ubuntu3.2 - Upgrade
Upgrade
ubuntu/bluezto a version that resolves this vulnerability.Fixed in 5.53-0ubuntu3.2 - Upgrade
Upgrade
ubuntu/libbluetooth3to a version that resolves this vulnerability.Fixed in 5.48-0ubuntu3.5 - Upgrade
Upgrade
ubuntu/bluezto a version that resolves this vulnerability.Fixed in 5.48-0ubuntu3.5
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
What is the vulnerability ID of this security advisory?
The vulnerability ID of this security advisory is USN-4989-1.
What is the severity of CVE-2020-26558?
The severity of CVE-2020-26558 is not specified in the security advisory.
What is the severity of CVE-2020-27153?
The severity of CVE-2020-27153 is not specified in the security advisory.
How do I fix the BlueZ vulnerabilities?
To fix the BlueZ vulnerabilities, you should update the affected software to the recommended versions mentioned in the security advisory.
Where can I find more information about the BlueZ vulnerabilities?
You can find more information about the BlueZ vulnerabilities in the references section of the security advisory.