CVE-2024-32755
📋 TL;DR
CVE-2024-32755 is an input validation vulnerability in Johnson Controls Metasys web interface that allows attackers to submit unexpected characters, potentially leading to system compromise. This affects industrial control systems using vulnerable Metasys versions. Organizations with exposed Metasys interfaces are at risk.
💻 Affected Systems
- Johnson Controls Metasys
⚠️ 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
Remote code execution leading to complete system takeover, manipulation of building automation systems, and physical safety risks.
Likely Case
Unauthorized access to building control systems, data exfiltration, and disruption of HVAC/security operations.
If Mitigated
Limited impact with proper network segmentation and input validation controls in place.
🎯 Exploit Status
Input validation flaws typically have low exploitation complexity once discovered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Consult 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 2. Download appropriate patch 3. Apply patch following vendor instructions 4. Restart affected services 5. Verify patch application
🔧 Temporary Workarounds
Network Segmentation
allIsolate Metasys systems from untrusted networks and internet.
Web Application Firewall
allDeploy WAF with input validation rules to block malicious requests.
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor web interface logs for unusual input patterns
🔍 How to Verify
Check if Vulnerable:
Check Metasys version against Johnson Controls advisory; test web interface with input validation testing tools.Check Version:
Check Metasys application version through administrative interface or system documentation.Verify Fix Applied:
Verify patch version installed and test web interface with previously vulnerable inputs.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to web interface
- Input containing unexpected characters or patterns
Network Indicators:
- Anomalous traffic to Metasys web ports
- Requests bypassing normal input validation
SIEM Query:
source="metasys_web_logs" AND (http_request CONTAINS "unexpected_characters" OR status_code=400)