CVE-2025-61740
📋 TL;DR
This CVE describes an authentication bypass vulnerability in Johnson Controls building automation systems where packet source verification is missing. Attackers could send unauthenticated packets to cause denial-of-service or modify device configurations. This affects Johnson Controls Metasys and Facility Explorer systems used in building management.
💻 Affected Systems
- Johnson Controls Metasys
- Johnson Controls Facility Explorer
⚠️ 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
Complete system takeover allowing attackers to disable critical building systems (HVAC, lighting, access control), modify configurations to create unsafe conditions, or cause widespread service disruption.
Likely Case
Targeted denial-of-service attacks disrupting building operations, unauthorized configuration changes affecting system performance, or reconnaissance for further attacks.
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only affecting isolated systems with minimal operational disruption.
🎯 Exploit Status
Exploitation requires network access to vulnerable devices but no authentication. Attackers need to craft specific packets targeting the authentication bypass.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Johnson Controls advisory for specific patched versions
Vendor Advisory: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
Restart Required: Yes
Instructions:
1. Review Johnson Controls advisory for affected products. 2. Download appropriate firmware updates from Johnson Controls support portal. 3. Apply updates following vendor instructions. 4. Restart affected devices. 5. Verify patch application.
🔧 Temporary Workarounds
Network Segmentation
allIsolate building automation systems from untrusted networks
Firewall Rules
allRestrict network access to affected devices using firewall ACLs
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems
- Deploy network monitoring and intrusion detection for anomalous traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Johnson Controls advisory. Systems running unpatched versions are vulnerable.Check Version:
Check via Johnson Controls system interface or device management console (vendor-specific commands vary by product)Verify Fix Applied:
Verify firmware version matches patched version in vendor advisory and test authentication functionality.📡 Detection & Monitoring
Log Indicators:
- Authentication failures from unexpected sources
- Configuration changes without proper authentication logs
- Unusual packet patterns to building automation ports
Network Indicators:
- Unusual traffic to building automation system ports (typically 1100-1200 range)
- Packets with malformed authentication headers
- Traffic from unexpected source IPs to control systems
SIEM Query:
source_ip NOT IN (trusted_ips) AND dest_port IN (1100,1101,1200) AND protocol=TCP