CVE-2020-17500
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary commands on Barco TransForm N network devices by injecting malicious code into the username or password fields of the web administration panel. Affected devices include NDN-210 Lite, NDN-210 Pro, NDN-211 Lite, and NDN-211 Pro running versions before 3.8.
💻 Affected Systems
- Barco TransForm NDN-210 Lite
- Barco TransForm NDN-210 Pro
- Barco TransForm NDN-211 Lite
- Barco TransForm NDN-211 Pro
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the network device leading to lateral movement, data exfiltration, or use as a pivot point for attacking other internal systems.
Likely Case
Unauthenticated remote code execution allowing attackers to gain shell access, modify configurations, or disrupt network operations.
If Mitigated
Limited impact if devices are isolated, patched, or have network access controls preventing external exploitation.
🎯 Exploit Status
The vulnerability requires no authentication and command injection is straightforward once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: TransForm N version 3.8 and later
Vendor Advisory: https://www.barco.com/en/support/knowledge-base/kb11588
Restart Required: Yes
Instructions:
1. Download TransForm N version 3.8 or later from Barco support portal. 2. Backup current configuration. 3. Apply the update following Barco's upgrade documentation. 4. Restart the device. 5. Verify the patch is applied successfully.
🔧 Temporary Workarounds
Network Isolation
allRestrict access to the web administration panel using firewall rules or network segmentation.
Disable Web Interface
allIf possible, disable the web administration panel and use alternative management methods.
🧯 If You Can't Patch
- Implement strict network access controls to limit which IP addresses can reach the web administration panel.
- Monitor authentication logs for unusual patterns or command injection attempts.
🔍 How to Verify
Check if Vulnerable:
Check the device version via the web interface or CLI. If version is below 3.8, the device is vulnerable.Check Version:
Check via web interface at https://[device-ip]/ or consult device documentation for CLI version command.Verify Fix Applied:
After patching, verify the version is 3.8 or higher and test that command injection attempts in authentication fields are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts with special characters in username/password fields
- Failed login attempts containing shell metacharacters like ;, |, &, $, `
Network Indicators:
- HTTP POST requests to login endpoints with suspicious payloads
- Unexpected outbound connections from the device
SIEM Query:
source="barco_ndn_logs" AND (username=*[;|&`$]* OR password=*[;|&`$]*)🔗 References
- https://www.barco.com/en/support/cms
- https://www.barco.com/en/support/knowledge-base/kb11588
- https://www.barco.com/en/support/transform-n-management-server
- https://www.barco.com/en/support/cms
- https://www.barco.com/en/support/knowledge-base/kb11588
- https://www.barco.com/en/support/transform-n-management-server
