CVE-2021-38442
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code by tricking users into opening malicious project files in FATEK Automation WinProladder. It affects all users of WinProladder version 3.30 and earlier who open untrusted project files.
💻 Affected Systems
- FATEK Automation WinProladder
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through remote code execution, potentially allowing attackers to manipulate industrial control systems or steal sensitive data.
Likely Case
Local privilege escalation or system compromise when users open malicious project files from untrusted sources.
If Mitigated
Limited impact if proper network segmentation and file validation controls prevent malicious files from reaching vulnerable systems.
🎯 Exploit Status
Requires user interaction to open malicious project file. No public exploit code available as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.31 or later
Vendor Advisory: https://us-cert.cisa.gov/ics/advisories/icsa-21-280-06
Restart Required: Yes
Instructions:
1. Download WinProladder version 3.31 or later from FATEK Automation website. 2. Uninstall previous version. 3. Install updated version. 4. Restart system.
🔧 Temporary Workarounds
Restrict project file access
windowsOnly open project files from trusted sources and implement file validation controls.
Network segmentation
allIsolate WinProladder systems from untrusted networks and implement application whitelisting.
🧯 If You Can't Patch
- Implement strict file validation policies to only allow trusted .wlp files
- Run WinProladder in isolated virtual environments with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check WinProladder version in Help > About menu. If version is 3.30 or earlier, system is vulnerable.Check Version:
Not applicable - check via application GUIVerify Fix Applied:
Verify version is 3.31 or later in Help > About menu after update.📡 Detection & Monitoring
Log Indicators:
- Unexpected crashes of WinProladder.exe
- Unusual file access patterns to .wlp files
Network Indicators:
- Unusual network connections originating from WinProladder process
SIEM Query:
Process:WinProladder.exe AND (EventID:1000 OR FileExtension:.wlp)