CVE-2020-16210
📋 TL;DR
CVE-2020-16210 is a reflected cross-site scripting (XSS) vulnerability in Red Lion's N-Tron 702-W and 702M12-W industrial switches, allowing attackers to inject malicious scripts via web interface inputs. If exploited, it can enable remote code execution and perform actions as the attacked user, affecting all versions of these devices.
💻 Affected Systems
- Red Lion N-Tron 702-W
- Red Lion N-Tron 702M12-W
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could remotely execute arbitrary code, compromise the device, and pivot to other systems on the network, leading to full network control or data theft.
Likely Case
Attackers may steal user sessions, perform unauthorized actions, or deploy malware via the web interface, disrupting industrial operations.
If Mitigated
With proper input validation and output encoding, the risk is reduced to minimal, preventing script injection and limiting impact to isolated incidents.
🎯 Exploit Status
Exploits are publicly available, making it easy for attackers to leverage; no authentication is required to trigger the XSS.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://us-cert.cisa.gov/ics/advisories/icsa-20-240-01
Restart Required: No
Instructions:
No official patch exists; refer to vendor advisory for updates and rely on workarounds or replacement.
🔧 Temporary Workarounds
Disable Web Interface
allTurn off the web management interface to prevent XSS attacks via network access.
Access device CLI and use command to disable web server (specific command varies by device).
Network Segmentation
allIsolate affected devices in a separate VLAN to limit exposure and access.
Configure network switches to restrict traffic to/from vulnerable devices.
🧯 If You Can't Patch
- Implement strict input validation and output encoding on any custom applications interacting with the device.
- Monitor network traffic for unusual patterns and restrict access to the device's web interface using firewalls.
🔍 How to Verify
Check if Vulnerable:
Test the web interface by injecting a simple script (e.g., <script>alert('test')</script>) into input fields and check if it executes.Check Version:
Log into the device web interface or CLI and check firmware version in settings (specific command varies).Verify Fix Applied:
Verify that script injections no longer execute and that web interface is disabled or segmented.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests with script tags or encoded payloads in web server logs.
Network Indicators:
- Suspicious traffic to device web ports (e.g., 80, 443) with XSS patterns.
SIEM Query:
source="device_logs" AND (http_request CONTAINS "<script>" OR http_request CONTAINS "javascript:")🔗 References
- http://packetstormsecurity.com/files/159064/Red-Lion-N-Tron-702-W-702M12-W-2.0.26-XSS-CSRF-Shell.html
- http://seclists.org/fulldisclosure/2020/Sep/6
- https://us-cert.cisa.gov/ics/advisories/icsa-20-240-01
- http://packetstormsecurity.com/files/159064/Red-Lion-N-Tron-702-W-702M12-W-2.0.26-XSS-CSRF-Shell.html
- http://seclists.org/fulldisclosure/2020/Sep/6
- https://us-cert.cisa.gov/ics/advisories/icsa-20-240-01
