CVE-2020-25010
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Kyland KPS2204 6 Port Managed Din-Rail Programmable Serial Device Servers by uploading malicious scripts via specially crafted POST requests. It affects organizations using these industrial serial device servers with vulnerable software versions. Attackers can gain complete control over affected devices.
💻 Affected Systems
- Kyland KPS2204 6 Port Managed Din-Rail Programmable Serial Device Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems, allowing attackers to disrupt operations, steal sensitive industrial data, or use devices as footholds into broader networks.
Likely Case
Remote code execution leading to device takeover, data exfiltration, or use in botnets for DDoS attacks.
If Mitigated
Limited impact if devices are isolated in air-gapped networks with strict access controls and monitoring.
🎯 Exploit Status
Exploit requires constructing specific POST requests to upload malicious files. Public proof-of-concept exists in GitHub repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Contact Kyland for updated firmware. Consider replacing with supported devices if no fix is provided.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices in separate VLANs with strict firewall rules blocking unnecessary inbound traffic.
Access Control Lists
allImplement IP-based restrictions to only allow management access from trusted administrative networks.
🧯 If You Can't Patch
- Remove devices from internet-facing networks immediately
- Implement strict network monitoring and anomaly detection for unusual POST requests to device management interfaces
🔍 How to Verify
Check if Vulnerable:
Check device web interface for software version R0002.P05. Attempt to access device via web interface and verify version.Check Version:
Access device web interface at http://[device-ip]/ and check System Information or About page for software version.Verify Fix Applied:
Verify device firmware has been updated to a version newer than R0002.P05. Test if malicious file upload via POST requests is still possible.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to device management interface
- File upload attempts to unexpected paths
- Multiple failed authentication attempts followed by successful POST requests
Network Indicators:
- POST requests to device IP on port 80/443 with file upload parameters
- Unusual outbound connections from industrial devices
SIEM Query:
source_ip="industrial_device_ip" AND (http_method="POST" AND uri CONTAINS "upload" OR uri CONTAINS "file")