CVE-2025-43876
📋 TL;DR
This CVE describes an OS command injection vulnerability (CWE-78) in Johnson Controls building automation systems. Attackers could execute arbitrary commands on affected devices, potentially gaining unauthorized access. Organizations using vulnerable Johnson Controls products are affected.
💻 Affected Systems
- Johnson Controls building automation systems (specific models not detailed in available references)
⚠️ 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
Full device compromise allowing attackers to execute arbitrary commands, access sensitive building control systems, pivot to other network segments, and disrupt critical building operations.
Likely Case
Unauthorized access to device with limited privileges, potential data exfiltration, and ability to modify building automation settings.
If Mitigated
Attack prevented by network segmentation and proper access controls, with only isolated impact on single device.
🎯 Exploit Status
Requires specific conditions and potentially some level of access. CISA advisory suggests exploitation is possible under certain circumstances.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
Restart Required: Yes
Instructions:
1. Review Johnson Controls security advisory for affected products. 2. Download and apply vendor-provided patches. 3. Restart affected devices. 4. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate building automation systems from corporate networks and internet
Access Control Hardening
allImplement strict authentication and authorization controls for building management interfaces
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy intrusion detection systems monitoring for command injection patterns
🔍 How to Verify
Check if Vulnerable:
Check device version against vendor advisory and verify if system exhibits command injection vulnerabilitiesCheck Version:
Check device web interface or console for firmware/software version informationVerify Fix Applied:
Verify patch version installation and test that command injection attempts are properly blocked📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Failed authentication attempts followed by command execution
- System command logs showing unexpected processes
Network Indicators:
- Unusual outbound connections from building automation devices
- Command injection patterns in HTTP requests
SIEM Query:
source="building_automation" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*)")