Ava-341: API missing cache control headers could lead to caching of sensitive information

Release Date

10th December 2020.

Overview

The APIs of Ava Aware, Ava cameras, and Ava Cloud did not use cache control response headers which means that sensitive information may have been cached on end users' devices. An attacker with access to the user's filesystem would then be able to extract the cached information.

Affected Products

• Ava Aware:
• All Stable upgrade channel versions before 3.2.4.
• All Beta upgrade channel versions before 3.3.0.
• Ava cameras:
• All Stable upgrade channel versions before 3.2.4.
• All Beta upgrade channel versions before 3.3.0.
• Ava Cloud: before 10th December 2020.

Unaffected Products

• Ava Aware:
• All Stable upgrade channel versions after and including 3.2.4.
• All Beta upgrade channel versions after and including 3.3.0.
• Ava cameras:
• All Stable upgrade channel versions after and including 3.2.4.
• All Beta upgrade channel versions after and including 3.3.0.
• Ava Cloud: from 10th December 2020.

Resolution

This issue has been fixed in Ava Aware Beta upgrade channel version 3.3.0 and Stable upgrade channel version 3.2.4. We recommend that all 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. A fix was deployed to the Ava Cloud on 10th December 2020. Ava Cloud customers do not need to take any additional action. This issue has been fixed in Ava camera Beta upgrade channel version 3.3.0 and Stable upgrade channel version 3.2.4. We recommend 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 cameras.

Vulnerability Information

• CVE: Pending
• CVSSv3 score: 5.5 (Medium)
• CVSSv3 vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Mitigations

We recommend that all Ava Aware, Ava camera, and Ava Cloud users clear their browser caches after upgrading to an unaffected version.

Work arounds

There are no known work arounds for this issue.

Acknowledgements

Issue found internally by Ava Security.

Disclosure Timeline

• 07/12/2020 Issue found internally by Ava Security
• 07/12/2020 Root cause established
• 07/12/2020 Fix identified
• 10/12/2020 Patched Ava Cloud released
• 10/12/2020 Patched Ava Aware (Beta upgrade channel) released
• 10/12/2020 Patched Ava Aware (Stable upgrade channel) released
• 10/12/2020 Patched Ava cameras (Beta upgrade channel) released
• 10/12/2020 Patched Ava cameras (Stable upgrade channel) released
• 10/12/2020 Advisory published internally
• 10/12/2020 Vulnerability publicly disclosed