CVE-2023-27482

Description

homeassistant is an open source home automation tool. A remotely exploitable vulnerability bypassing authentication for accessing the Supervisor API through Home Assistant has been discovered. This impacts all Home Assistant installation types that use the Supervisor 2023.01.1 or older. Installation types, like Home Assistant Container (for example Docker), or Home Assistant Core manually in a Python environment, are not affected. The issue has been mitigated and closed in Supervisor version 2023.03.1, which has been rolled out to all affected installations via the auto-update feature of the Supervisor. This rollout has been completed at the time of publication of this advisory. Home Assistant Core 2023.3.0 included mitigation for this vulnerability. Upgrading to at least that version is thus advised. In case one is not able to upgrade the Home Assistant Supervisor or the Home Assistant Core application at this time, it is advised to not expose your Home Assistant instance to the internet.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 89.48% Top 5%
Vendor Advisory github.com Vendor Advisory home-assistant.io
Affected: home-assistant core
Affected: home-assistant supervisor
Published at:
Updated at:

References

Link Tags
https://github.com/home-assistant/core/security/advisories/GHSA-2j8f-h4mr-qr25 vendor advisory
https://www.home-assistant.io/blog/2023/03/08/supervisor-security-disclosure/ vendor advisory issue tracking
https://github.com/elttam/publications/blob/master/writeups/home-assistant/supervisor-authentication-bypass-advisory.md
https://www.elttam.com/blog/pwnassistant/

Frequently Asked Questions

What is the severity of CVE-2023-27482?
CVE-2023-27482 has been scored as a critical severity vulnerability.
How to fix CVE-2023-27482?
To fix CVE-2023-27482, 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-2023-27482 being actively exploited in the wild?
It is possible that CVE-2023-27482 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~89% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-27482?
CVE-2023-27482 affects home-assistant core, home-assistant supervisor.
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