CVE-2023-50466
📋 TL;DR
This CVE describes an authenticated command injection vulnerability in Weintek cMT2078X HMI devices running easyWeb v2.1.3 and OS v20220215. Attackers with valid credentials can inject malicious payloads into the HMI Name parameter to execute arbitrary code or access sensitive information. Organizations using these specific Weintek HMI devices are affected.
💻 Affected Systems
- Weintek cMT2078X
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands with system privileges, potentially leading to industrial process disruption, data theft, or lateral movement into OT networks.
Likely Case
Unauthorized command execution leading to data exfiltration, configuration changes, or denial of service affecting HMI functionality.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts from reaching vulnerable systems.
🎯 Exploit Status
Exploitation requires valid credentials but is straightforward once authenticated. The vulnerability is well-documented in public reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Weintek's official website or contact vendor support for security updates. No official patch information is currently available in public sources.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Weintek HMI devices from untrusted networks and restrict access to authorized personnel only.
Access Control Hardening
allImplement strong authentication mechanisms, change default credentials, and limit administrative access to necessary personnel.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices from internet and untrusted networks
- Deploy web application firewalls (WAF) with command injection detection rules in front of HMI interfaces
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or device settings. If running easyWeb v2.1.3 with OS v20220215, the device is vulnerable.Check Version:
Access device web interface and navigate to system information or settings page to view firmware versions.Verify Fix Applied:
Verify firmware has been updated to a version beyond the affected releases. Check vendor advisories for specific patched versions.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by successful login and parameter manipulation
- Unexpected system process creation
Network Indicators:
- Unusual HTTP POST requests to HMI Name parameter endpoints
- Command injection patterns in web traffic to HMI interfaces
- Unexpected outbound connections from HMI devices
SIEM Query:
source="weintek_hmi" AND (http_method="POST" AND uri_path="/hmi_name" AND (content="|" OR content="$" OR content="`"))