CVE-2023-37861
📋 TL;DR
This vulnerability allows authenticated remote attackers to execute arbitrary code with root privileges on PHOENIX CONTACT WP 6xxx series web panels by uploading a specially crafted certificate via HTTP POST. Affected systems are industrial web panels running vulnerable firmware versions, primarily used in industrial control and automation environments.
💻 Affected Systems
- PHOENIX CONTACT WP 6xxx series web panels
📦 What is this software?
Wp 6070 Wvps Firmware by Phoenixcontact
Wp 6101 Wxps Firmware by Phoenixcontact
Wp 6121 Wxps Firmware by Phoenixcontact
Wp 6156 Whps Firmware by Phoenixcontact
Wp 6185 Whps Firmware by Phoenixcontact
Wp 6215 Whps Firmware by Phoenixcontact
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the industrial control system with root access, enabling attackers to disrupt operations, manipulate processes, steal sensitive data, or establish persistence for further attacks.
Likely Case
Unauthorized code execution leading to operational disruption, data exfiltration, or lateral movement within industrial networks.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and monitoring are in place to detect and block exploitation attempts.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once credentials are obtained. The vulnerability is in certificate upload functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.10
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2023-018/
Restart Required: Yes
Instructions:
1. Download firmware version 4.0.10 from PHOENIX CONTACT support portal. 2. Backup current configuration. 3. Upload new firmware via web interface. 4. Reboot device. 5. Verify firmware version.
🔧 Temporary Workarounds
Disable certificate upload functionality
allRestrict or disable certificate management features in the web interface if not required.
Network segmentation
allIsolate web panels in dedicated network segments with strict firewall rules.
🧯 If You Can't Patch
- Implement strict network access controls to limit web panel access to authorized users only
- Enable detailed logging and monitoring for certificate upload attempts and unusual activities
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface under System > Information. If version is below 4.0.10, the system is vulnerable.Check Version:
Not applicable - check via web interfaceVerify Fix Applied:
After patching, verify firmware version shows 4.0.10 or higher in System > Information.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to certificate upload endpoints
- Unusual certificate upload activities
- Authentication logs showing brute force attempts
Network Indicators:
- HTTP traffic to web panel on port 80/443 with POST requests containing certificate data
- Outbound connections from web panels to unexpected destinations
SIEM Query:
source="web_panel_logs" AND (uri_path="/certificate/upload" OR method="POST" AND uri_path CONTAINS "certificate")