CVE-2018-14790
📋 TL;DR
A buffer over-read vulnerability in Fuji Electric FRENIC LOADER software allows remote attackers to execute arbitrary code on affected industrial control systems. This affects multiple FRENIC variable frequency drive models running vulnerable firmware versions. Industrial facilities using these drives for motor control are at risk.
💻 Affected Systems
- FRENIC-Mini (C1)
- FRENIC-Mini (C2)
- FRENIC-Eco
- FRENIC-Multi
- FRENIC-MEGA
- FRENIC-Ace
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control system leading to physical damage, production shutdown, or safety incidents through unauthorized motor control.
Likely Case
Remote code execution allowing attackers to disrupt operations, steal intellectual property, or pivot to other industrial systems.
If Mitigated
Limited impact if drives are isolated in segmented networks with proper access controls and monitoring.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network attack vector and no authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to FRENIC LOADER v3.3 v7.3.4.1b or later
Vendor Advisory: https://ics-cert.us-cert.gov/advisories/ICSA-18-270-03
Restart Required: Yes
Instructions:
1. Contact Fuji Electric for updated firmware. 2. Backup current configurations. 3. Apply firmware update using FRENIC LOADER software. 4. Restart affected drives. 5. Verify proper operation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate FRENIC drives in dedicated industrial network segments with strict firewall rules.
Access Control Lists
allImplement strict network ACLs to allow only authorized engineering stations to communicate with drives.
🧯 If You Can't Patch
- Implement network segmentation and strict firewall rules to isolate drives from untrusted networks
- Monitor network traffic to/from FRENIC drives for anomalous patterns and implement intrusion detection
🔍 How to Verify
Check if Vulnerable:
Check FRENIC LOADER software version in the application interface or configuration files.Check Version:
Check version in FRENIC LOADER software interface or configuration files (no standard CLI command available)Verify Fix Applied:
Verify FRENIC LOADER version is v7.3.4.1b or later and test drive communication functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual connection attempts to FRENIC drive ports
- Multiple failed communication attempts
- Unexpected configuration changes
Network Indicators:
- Traffic to FRENIC drive ports from unauthorized sources
- Malformed packets to drive communication ports
- Unexpected protocol anomalies
SIEM Query:
source_ip NOT IN (authorized_engineering_stations) AND dest_port IN (frenic_ports)