CVE-2020-37209
📋 TL;DR
CVE-2020-37209 is a buffer overflow vulnerability in SpotFTP 3.0.0.0 that allows attackers to crash the application by entering a 1000-character payload in the registration name field. This affects users of SpotFTP 3.0.0.0 who have the application installed and accessible.
💻 Affected Systems
- SpotFTP
📦 What is this software?
Spotftp by Nsasoft
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service rendering SpotFTP unusable, potentially disrupting FTP password recovery operations.
Likely Case
Application crash requiring restart, temporary disruption of FTP password recovery functionality.
If Mitigated
Minimal impact if application is isolated and restarts automatically.
🎯 Exploit Status
Simple copy-paste exploit requiring no authentication; exploit code is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://www.nsauditor.com/
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or using alternative software.
🔧 Temporary Workarounds
Input Validation Restriction
windowsLimit character input in the Name field to prevent buffer overflow
🧯 If You Can't Patch
- Restrict access to SpotFTP to trusted users only
- Monitor for abnormal application crashes and investigate
🔍 How to Verify
Check if Vulnerable:
Check if SpotFTP version is 3.0.0.0 via Help > About menuCheck Version:
Check Help > About menu in SpotFTP GUIVerify Fix Applied:
Test by entering 1000+ characters in Name field - application should not crash📡 Detection & Monitoring
Log Indicators:
- Application crash logs from SpotFTP
- Windows Event Logs showing application termination
Network Indicators:
- No network indicators - local exploit only
SIEM Query:
EventID=1000 AND SourceName="SpotFTP" OR ProcessName="SpotFTP.exe"