QID 198579

Date Published: 2021-11-24

QID 198579: Ubuntu Security Notification for BlueZ Vulnerabilities (USN-5155-1)

Bluez incorrectly handled the discoverable status when a device is powered down.
Bluez incorrectly handled certain memory operations.
The bluez gatt server incorrectly handled disconnects.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

this could result in devices being powered up discoverable, contrary to expectations.
This issue only affected ubuntu 20.04 lts, ubuntu 21.04, and ubuntu 21.10. (
Cve-2021-3658).
a remote attacker could possibly use this issue to cause bluez to consume resources, leading to a denial of service. (
Cve-2021-41229).
A remote attacker could possibly use this issue to cause bluez to crash, leading to a denial of service. (
Cve-2021-43400).

  • CVSS V3 rated as Critical - 9.1 severity.
  • CVSS V2 rated as High - 6.4 severity.
    • Solution
    Refer to Ubuntu advisory: USN-5155-1 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 198579

    CVE-2021-43400 | CVE-2021-41229 | CVE-2021-3658 |
    Software Advisories
    Advisory ID Software Component Link
    USN-5155-1 Ubuntu Linux URL Logo ubuntu.com/security/notices/USN-5155-1
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