CVE-2020-37139
📋 TL;DR
CVE-2020-37139 is a local denial of service vulnerability in Odin Secure FTP Expert 7.6.3 that allows attackers to crash the application by pasting 108 bytes of repeated characters into connection fields, causing a buffer overflow. This affects users of Odin Secure FTP Expert 7.6.3 on Windows systems where attackers have local access to the application.
💻 Affected Systems
- Odin Secure FTP Expert
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash leading to denial of service for legitimate users, potential data loss for in-progress transfers, and possible system instability if the crash affects other processes.
Likely Case
Application crash requiring restart, temporary disruption of file transfer operations, and potential loss of unsaved connection configurations.
If Mitigated
Minimal impact if application is restarted quickly, though repeated attacks could cause persistent service disruption.
🎯 Exploit Status
Exploit requires local access to the application interface. The exploit is simple - pasting 108 bytes of repeated characters into connection fields. Proof of concept is publicly available on Exploit-DB.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or discontinuing use of vulnerable version.
🔧 Temporary Workarounds
Restrict Application Access
windowsLimit access to Odin Secure FTP Expert to trusted users only to prevent malicious actors from triggering the vulnerability.
Input Validation Monitoring
windowsMonitor application logs for unusual input patterns in connection fields and implement application-level input validation if possible.
🧯 If You Can't Patch
- Replace Odin Secure FTP Expert 7.6.3 with alternative FTP client software that doesn't have this vulnerability
- Implement strict access controls to limit who can use the vulnerable application
🔍 How to Verify
Check if Vulnerable:
Check if Odin Secure FTP Expert version 7.6.3 is installed. Navigate to Help > About in the application to verify version.Check Version:
Not applicable via command line. Check via application GUI: Help > AboutVerify Fix Applied:
Since no official patch exists, verification involves confirming the application has been upgraded to a newer version or replaced entirely.📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unexpected termination events in Windows Event Viewer
- Repeated application restart attempts
Network Indicators:
- Sudden cessation of FTP/SFTP traffic from affected system
SIEM Query:
EventID=1000 OR EventID=1001 AND SourceName="Odin Secure FTP Expert" AND Keywords="Application crash"