CVE-2020-7007
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code on Moxa EDS-G516E Series industrial switches, potentially taking the device offline. It affects users running firmware version 5.2 or lower, primarily in industrial control and critical infrastructure environments.
💻 Affected Systems
- Moxa EDS-G516E Series
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to service disruption, data theft, or lateral movement within industrial networks.
Likely Case
Device outage causing operational downtime in industrial settings.
If Mitigated
Limited impact if devices are isolated and patched promptly.
🎯 Exploit Status
Based on CVSS score and description, exploitation may be straightforward, but no public proof-of-concept is confirmed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version above 5.2 (check vendor for specific version)
Vendor Advisory: https://www.moxa.com/en/support/product-support/security-advisory/moxa-eds-g516e-series-firmware-vulnerability
Restart Required: Yes
Instructions:
1. Download the latest firmware from Moxa's website. 2. Backup device configuration. 3. Upload and install the firmware via the web interface or CLI. 4. Reboot the device. 5. Verify the update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks to reduce attack surface.
Access Control Lists
allImplement ACLs to restrict access to device management interfaces.
access-list 100 deny ip any any
🧯 If You Can't Patch
- Deploy network monitoring and intrusion detection systems to alert on suspicious activity.
- Ensure devices are not exposed to the internet and limit internal access to trusted IPs only.
🔍 How to Verify
Check if Vulnerable:
Check the firmware version via the device web interface or CLI command 'show version'.Check Version:
show versionVerify Fix Applied:
Confirm firmware version is above 5.2 and test device functionality.📡 Detection & Monitoring
Log Indicators:
- Unexpected device reboots
- Unauthorized configuration changes
- Failed login attempts
Network Indicators:
- Unusual traffic to device management ports (e.g., 80, 443)
- Suspicious payloads in network packets
SIEM Query:
source="eds-g516e" AND (event="reboot" OR event="config_change")