Alta Aware — 1589: k8s.io/APIServer-v0.29.1 (github.com/kubernetes/apiserver) request cancellation allowed resetting many streams quickly

Release Date

31st of July 2024.

Overview

A vulnerability in the k8s.io/APIServer-v0.29.1 (github.com/kubernetes/apiserver) Go package allowed attackers to exhaust server resources by rapidly resetting multiple HTTP/2 streams through request cancellation.

Affected Products

• Ava Aware:

  • All Stable upgrade channel versions before 6.9.5.
  • All Beta upgrade channel versions before 6.9.0.

• Ava Cloud: before 7th May 2024.

Unaffected Products

• Ava Aware:

  • All Stable upgrade channel versions after and including 6.9.5.
  • All Beta upgrade channel versions after and including 6.9.0.

• Ava Cameras: all versions.

• Ava Cloud: from 7th May 2024

Resolution

This issue has been fixed in Ava Aware Beta upgrade channel version 6.9.0 and Stable upgrade channel version 6.9.5.

It is highly recommended that all installations running an affected version are upgraded to the latest release as soon as possible. Releases are available to download through the Ava Aware User Interface.

A fix was deployed to the Ava Cloud on 7th May 2024. Ava Cloud customers do not need to take any additional action.

Vulnerability Information

• CVE: CVE-2023-44487
• CVSSv3 score: 7.5 (High)
• CVSSv3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Mitigations

There are no known mitigations for this issue.

Work arounds

There are no known work arounds for this issue.

Acknowledgements

Issue reported by Joakim Erdfelt, Farouk Faiz, Duy Tran, Derek Held, and Eric Bickle.

Disclosure Timeline

• 29/04/2024 Issue found
• 29/04/2024 Root cause established
• 29/04/2024 Fix identified
• 07/05/2024 Patched Ava Cloud released
• 21/05/2024 Patched Ava Aware (Beta upgrade channel) released
• 01/07/2024 Patched Ava Aware (Stable upgrade channel) released
• 31/07/2024 Vulnerability publicly disclosed