CVE-2025-8008
📋 TL;DR
A vulnerability in EN4TR devices allows attackers to cause denial of service by sending specially crafted messages during Forward Close operations. This affects industrial control systems using vulnerable EN4TR devices in protected mode. The crash disrupts device functionality and requires manual intervention to restore service.
💻 Affected Systems
- EN4TR devices
📦 What is this software?
1756 En2tr Series A Firmware by Rockwellautomation
1756 En2tr Series B Firmware by Rockwellautomation
1756 En2tr Series C Firmware by Rockwellautomation
1756 En4tr Firmware by Rockwellautomation
1756 En4trxt Firmware by Rockwellautomation
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reset, disrupting industrial processes and potentially causing production downtime or safety issues in critical infrastructure.
Likely Case
Temporary denial of service affecting specific device functions, requiring manual reboot and causing operational disruption until restored.
If Mitigated
Minimal impact with proper network segmentation and monitoring, allowing quick detection and recovery without affecting critical processes.
🎯 Exploit Status
Exploitation requires knowledge of industrial protocols and ability to send crafted messages during specific operational states.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Rockwell Automation advisory SD1739 for specific firmware versions
Vendor Advisory: https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1739.html
Restart Required: No
Instructions:
1. Download updated firmware from Rockwell Automation support portal. 2. Follow manufacturer's firmware update procedures for EN4TR devices. 3. Verify successful update and device functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate EN4TR devices in separate network segments with strict firewall rules to limit access to authorized systems only.
Protocol Filtering
allImplement network filtering to block unauthorized messages to EN4TR devices, particularly during Forward Close operations.
🧯 If You Can't Patch
- Implement strict network access controls to limit communication to EN4TR devices only from authorized engineering workstations.
- Deploy network monitoring and intrusion detection systems to alert on anomalous traffic patterns targeting EN4TR devices.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against patched versions listed in Rockwell Automation advisory SD1739.Check Version:
Use manufacturer's configuration tools or web interface to check EN4TR firmware version.Verify Fix Applied:
Verify firmware version matches patched release and test device functionality during Forward Close operations.📡 Detection & Monitoring
Log Indicators:
- Unexpected device reboots
- Forward Close operation failures
- Protocol error messages
Network Indicators:
- Unusual traffic patterns to EN4TR devices
- Crafted messages during Forward Close operations
SIEM Query:
source="network_device" AND (message="EN4TR crash" OR message="Forward Close error")