Alta Aware -1652: insufficient sanitisation in ssh server (csshd)

Release Date

4th of October 2024.

Overview

A vulnerability has been discovered in csshd (a custom ssh server implementation in Golang), due to insufficient sanitisation of arguments passed to the scp command. This vulnerability could lead to, among others threats, remote code execution.

Affected Products

• Ava Cameras:
  • All Stable upgrade Channel versions before 6.9.5.
  • All Beta upgrade channel versions before 6.9.3.

Unaffected Products

• Alta Video: all versions.
• Avigilon Cloud-Native Cameras:
  • All Stable upgrade channel versions after and including 6.9.5.
  • All Beta upgrade channel versions after and including 6.9.3.
• Alta Video Cloud: all versions.

Resolution

This issue has been fixed in Ava Camera Beta upgrade channel version 6.9.3 and Stable upgrade channel version 6.9.5.

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

• CVSSv3 score: 8.4 (High)
• CVSSv3 vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/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

Issue found internally by Avigilon Alta.

Disclosure Timeline

• 05/06/2024 Issue found
• 05/06/2024 Root cause established
• 06/06/2024 Fix identified
• 10/06/2024 Patched Ava Cameras (Beta upgrade channel) released
• 01/07/2024 Patched Ava Cameras (Stable upgrade channel) released
• 04/10/2024 Vulnerability publicly disclosed