CVE-2023-41897
📋 TL;DR
This vulnerability in Home Assistant allows attackers to perform clickjacking attacks by tricking users into clicking malicious elements on a page. This could lead to remote code execution by installing malicious add-ons. All Home Assistant users with versions before 2023.9.0 are affected.
💻 Affected Systems
- Home Assistant Core
📦 What is this software?
Home Assistant by Home Assistant
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution on the Home Assistant server, allowing full system compromise and potential lateral movement in the network.
Likely Case
Clickjacking attacks leading to unauthorized add-on installation or configuration changes.
If Mitigated
Minimal impact with proper HTTP security headers and user awareness.
🎯 Exploit Status
Clickjacking attacks are well-understood and easy to implement. The advisory mentions specific attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2023.9.0 and later
Vendor Advisory: https://github.com/home-assistant/core/security/advisories/GHSA-935v-rmg9-44mw
Restart Required: Yes
Instructions:
1. Backup your Home Assistant configuration. 2. Update Home Assistant to version 2023.9.0 or later via the Supervisor panel or command line. 3. Restart Home Assistant to apply the update.
🧯 If You Can't Patch
- Implement a reverse proxy with proper HTTP security headers (X-Frame-Options, Content-Security-Policy).
- Restrict Home Assistant access to trusted networks only and avoid exposing to the internet.
🔍 How to Verify
Check if Vulnerable:
Check Home Assistant version in the Configuration > Info panel or run 'ha core info' in the terminal.Check Version:
ha core info | grep 'version' or check the web interface at Configuration > InfoVerify Fix Applied:
Verify version is 2023.9.0 or later and test that X-Frame-Options header is present in HTTP responses.📡 Detection & Monitoring
Log Indicators:
- Unusual add-on installation events
- Unexpected configuration changes
Network Indicators:
- HTTP requests with missing X-Frame-Options header to Home Assistant
SIEM Query:
web.url:*/api/* AND NOT http.headers.x-frame-options:*🔗 References
- https://github.com/home-assistant/core/security/advisories/GHSA-935v-rmg9-44mw
- https://github.com/home-assistant/core/security/advisories/GHSA-cr83-q7r2-7f5q
- https://www.home-assistant.io/blog/2023/10/19/security-audits-of-home-assistant/
- https://github.com/home-assistant/core/security/advisories/GHSA-935v-rmg9-44mw
- https://github.com/home-assistant/core/security/advisories/GHSA-cr83-q7r2-7f5q
- https://www.home-assistant.io/blog/2023/10/19/security-audits-of-home-assistant/
