CVE-2024-12399
📋 TL;DR
This CVE describes an improper message integrity enforcement vulnerability in Schneider Electric HMI systems that allows man-in-the-middle attacks. Attackers can intercept communications to partially compromise confidentiality, integrity, and availability. Organizations using affected Schneider Electric HMI products are vulnerable.
💻 Affected Systems
- Schneider Electric HMI products (specific models not detailed in CVE)
⚠️ 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 compromise of HMI system allowing unauthorized control, data manipulation, and disruption of industrial processes
Likely Case
Interception and manipulation of HMI communications leading to data theft or operational interference
If Mitigated
Limited impact with proper network segmentation and integrity controls in place
🎯 Exploit Status
Requires man-in-the-middle position and knowledge of communication protocols
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in CVE description
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2025-014-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2025-014-02.pdf
Restart Required: No
Instructions:
1. Review Schneider Electric advisory SEVD-2025-014-02
2. Apply vendor-provided patches or firmware updates
3. Verify communication integrity controls are properly implemented
🔧 Temporary Workarounds
Network Segmentation
allIsolate HMI systems in separate network segments with strict access controls
VPN/Encryption Tunnel
allImplement encrypted communication channels between HMI and control systems
🧯 If You Can't Patch
- Implement network monitoring for unusual communication patterns
- Deploy industrial DMZ architecture with firewall rules restricting HMI communications
🔍 How to Verify
Check if Vulnerable:
Check Schneider Electric advisory for affected product models and versionsCheck Version:
Check HMI firmware version through device interface or management consoleVerify Fix Applied:
Verify communication integrity controls are active and test for man-in-the-middle vulnerabilities📡 Detection & Monitoring
Log Indicators:
- Unusual communication patterns
- Failed integrity checks
- Unexpected connection attempts
Network Indicators:
- Unencrypted HMI communications
- Protocol anomalies in industrial traffic
- ARP spoofing indicators
SIEM Query:
source="hmi_logs" AND (event_type="integrity_failure" OR protocol="unencrypted_industrial")