CVE-2025-25305
📋 TL;DR
CVE-2025-25305 is a man-in-the-middle vulnerability in Home Assistant Core caused by improper SSL certificate verification. When integrations migrated from aiohttp 2.x to 3.x, the verify_ssl parameter was incorrectly mapped to the new ssl parameter, disabling certificate validation. This affects Home Assistant users running versions before 2024.1.6.
💻 Affected Systems
- Home Assistant Core
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could intercept and modify all communication between Home Assistant and external services, potentially stealing credentials, injecting malicious commands, or compromising the entire smart home system.
Likely Case
Attackers on the same network could intercept API calls to third-party services, potentially gaining access to cloud accounts or modifying automation behavior.
If Mitigated
With proper network segmentation and monitoring, impact would be limited to potential data leakage from intercepted communications.
🎯 Exploit Status
Requires network position to intercept traffic. No public exploit code available as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.1.6 and later
Vendor Advisory: https://github.com/home-assistant/core/security/advisories/GHSA-m3pm-rpgg-5wj6
Restart Required: No
Instructions:
1. Backup your Home Assistant configuration. 2. Update Home Assistant Core to version 2024.1.6 or later via the Supervisor panel or command line. 3. Verify the update completed successfully.
🔧 Temporary Workarounds
No workarounds available
allThe vendor advisory states there are no known workarounds for this vulnerability.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Home Assistant from untrusted networks
- Monitor network traffic for unexpected SSL/TLS certificate changes or man-in-the-middle patterns
🔍 How to Verify
Check if Vulnerable:
Check Home Assistant version in Configuration > Info or run 'ha core info' in terminal. If version is below 2024.1.6, system is vulnerable.Check Version:
ha core info | grep versionVerify Fix Applied:
After updating, verify version is 2024.1.6 or higher. Check that integrations using external APIs continue to function properly.📡 Detection & Monitoring
Log Indicators:
- SSL certificate verification errors in Home Assistant logs
- Unexpected certificate authorities in SSL handshakes
Network Indicators:
- Unusual SSL/TLS certificate chains in traffic to/from Home Assistant
- Self-signed certificates in what should be validated connections
SIEM Query:
source="home-assistant" AND ("SSL" OR "certificate" OR "verify") AND ("error" OR "warning" OR "failed")