CVE-2023-41894

Local-only webhooks externally accessible via SniTun in Home Assistant Core

Description

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.25%
Vendor Advisory github.com Vendor Advisory home-assistant.io
Affected: home-assistant core
Published at:
Updated at:

References

Link Tags
https://github.com/home-assistant/core/security/advisories/GHSA-wx3j-3v2j-rf45 vendor advisory
https://www.home-assistant.io/blog/2023/10/19/security-audits-of-home-assistant/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-41894?
CVE-2023-41894 has been scored as a medium severity vulnerability.
How to fix CVE-2023-41894?
To fix CVE-2023-41894, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-41894 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-41894 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-41894?
CVE-2023-41894 affects home-assistant core.
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