Local-only webhooks externally accessible via SniTun in Home Assistant Core
CVE-2023-41894

5.3MEDIUM

Key Information:

Vendor

Home-assistant

Status
Core
Vendor
CVE Published:
20 October 2023

What is CVE-2023-41894?

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 Version(s)

core < 2023.9.0

References

https://github.com/home-assistant/core/security/advisorie...
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https://www.home-assistant.io/blog/2023/10/19/security-au...
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CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.