CVE-2023-41894: Local-only webhooks externally accessible via SniTun in Home Assistant Core
Home assistant is an open source home automation. The assessment verified that webhooks available in the webhook component are triggerable via the .ui.nabu.casa URL without authentication, even when the webhook is marked as Only accessible from the local network. This issue is facilitated by the SniTun proxy, which sets the source address to 127.0.0.1 on all requests sent to the public URL and forwarded to the local Home Assistant. This issue has been addressed in version 2023.9.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2023-41894?
CVE-2023-41894 is a vulnerability in the Home assistant open source home automation system that allows triggering webhooks without authentication, even if they are marked as accessible only from the local network.
How severe is CVE-2023-41894?
CVE-2023-41894 has a severity rating of 5.3, which is considered medium.
How does CVE-2023-41894 affect Home Assistant?
CVE-2023-41894 affects Home Assistant versions up to and including 2023.9.0.
How can I fix CVE-2023-41894?
To fix CVE-2023-41894, it is recommended to update to a version of Home Assistant that is newer than 2023.9.0 and apply any available patches.
Where can I find more information about CVE-2023-41894?
You can find more information about CVE-2023-41894 in the Home Assistant security advisory and the official Home Assistant blog post on security audits.