CVE-2024-11499
📋 TL;DR
An authenticated attacker can trigger a restart of RTU500 CMU units by updating certificates during active connections. This affects RTU500 IEC 60870-4-104 controlled stations used in industrial control systems. The CMU automatically recovers after restart.
💻 Affected Systems
- Hitachi Energy RTU500
⚠️ 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
Temporary disruption of industrial control operations during CMU restart, potentially affecting critical infrastructure monitoring and control.
Likely Case
Brief service interruption (seconds to minutes) during CMU restart and recovery, causing temporary loss of monitoring/control capabilities.
If Mitigated
Minimal impact with proper certificate management procedures and network segmentation.
🎯 Exploit Status
Requires authenticated access, knowledge of industrial protocols, and ability to update certificates during active sessions
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Consult vendor advisory for specific fixed versions
Vendor Advisory: https://publisher.hitachienergy.com/preview?DocumentId=8DBD000207&languageCode=en&Preview=true
Restart Required: Yes
Instructions:
1. Review vendor advisory for affected versions
2. Obtain updated firmware from Hitachi Energy
3. Schedule maintenance window for update
4. Apply firmware update following vendor procedures
5. Verify CMU functionality post-update
🔧 Temporary Workarounds
Certificate Management Control
allImplement strict procedures for certificate updates only during maintenance windows with no active connections
Network Segmentation
allIsolate RTU500 systems from general network access, restrict to authorized engineering stations only
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized certificate management
- Monitor for certificate update activities and investigate any unexpected changes
🔍 How to Verify
Check if Vulnerable:
Check RTU500 firmware version against vendor advisory and verify if using IEC 60870-4-104 with certificate authenticationCheck Version:
Consult RTU500 documentation for version check commands specific to your deploymentVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory and test certificate update procedures📡 Detection & Monitoring
Log Indicators:
- Unexpected certificate updates
- CMU restart events
- Authentication attempts to certificate management functions
Network Indicators:
- IEC 60870-4-104 protocol anomalies
- Certificate management traffic outside maintenance windows
SIEM Query:
Search for: 'RTU500 certificate update' OR 'CMU restart' events outside scheduled maintenance