CVE-2025-61736
📋 TL;DR
This vulnerability affects systems that fail to re-establish communication after certificate expiration, potentially causing service disruption. It impacts Johnson Controls products that rely on certificate-based communication for operational continuity.
💻 Affected Systems
- Johnson Controls products with certificate-based communication
⚠️ 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
Critical systems become completely non-operational when certificates expire, leading to loss of monitoring/control capabilities in industrial environments.
Likely Case
Service disruption requiring manual intervention to restore communication after certificate expiration.
If Mitigated
Minimal impact with proper certificate lifecycle management and monitoring in place.
🎯 Exploit Status
Exploitation occurs naturally when certificates expire without proper renewal mechanisms
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific versions
Vendor Advisory: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
Restart Required: Yes
Instructions:
1. Check Johnson Controls advisory for affected products 2. Apply vendor-provided patches 3. Restart affected systems 4. Verify certificate renewal functionality
🔧 Temporary Workarounds
Certificate Lifecycle Management
allImplement proactive certificate monitoring and renewal before expiration
Communication Redundancy
allConfigure alternative communication methods as backup
🧯 If You Can't Patch
- Implement strict certificate expiration monitoring with alerts 30+ days before expiry
- Establish manual certificate renewal procedures and test them regularly
🔍 How to Verify
Check if Vulnerable:
Check system logs for certificate expiration warnings and test certificate renewal processCheck Version:
Check product-specific version command per Johnson Controls documentationVerify Fix Applied:
Verify system maintains communication after simulated certificate expiration test📡 Detection & Monitoring
Log Indicators:
- Certificate expiration warnings
- Communication failure logs after certificate expiry
Network Indicators:
- Sudden drop in expected communication traffic
- Failed TLS handshakes
SIEM Query:
source="*johnson*" AND ("certificate expired" OR "SSL handshake failed")