Alta-Aware-758 Linux kernel BT subsystem vulnerabilities affecting the L2CAP subprotocol implementation

Release Date

25th of May 2023.

Overview

Linux kernel BT subsystem vulnerabilities (infoleak and use-after-free) affect the L2CAP subprotocol implementation, which could lead to a denial of service, information disclosure, or remote code execution.

Affected Products

• Ava Cameras:
  • All Stable upgrade Channel versions before 5.8.3.
  • All Beta upgrade channel versions before 5.8.0.

Unaffected Products

• Ava Aware: all versions.
• Ava Cameras:
  • All Stable upgrade channel versions after and including 5.8.3.
  • All Beta upgrade channel versions after and including 5.8.0.
• Ava Cloud: all versions.

Resolution

This issue has been fixed in Ava Camera Beta upgrade channel version 5.8.0 and Stable upgrade channel version 5.8.3.

It is highly recommended that all Ava Camera installations running an affected version upgrade to the latest release as soon as possible. Releases are available to download through the Ava Aware User Interface for Ava managed cameras and the Ava Camera User Interface for unmanaged Ava cameras.

Vulnerability Information

• CVE: CVE-2022-42896 and CVE-2022-42895
• CVSSv3 score: 8.1 (High)
• CVSSv3 vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigations

There are no known mitigations for this issue.

Work arounds

There are no known work arounds for this issue.

Acknowledgements

Issues found by Rafael Correa De Ysasi of Google.

Disclosure Timeline

• 06/02/2023 Issues found
• 31/03/2023 Root cause established
• 31/03/2023 Fix identified
• 06/04/2023 Patched Ava Cameras (Beta upgrade channel) released
• 04/05/2023 Patched Ava Cameras (Stable upgrade channel) released
• 25/05/2023 Vulnerability publicly disclosed