CVE-2020-37068
📋 TL;DR
CVE-2020-37068 is a critical buffer overflow vulnerability in Konica Minolta FTP Utility 1.0 that allows attackers to crash the FTP server and potentially execute arbitrary code by sending an oversized buffer to the LIST command. This affects all users running the vulnerable FTP utility version. The vulnerability requires network access to the FTP service to exploit.
💻 Affected Systems
- Konica Minolta FTP Utility
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment
Likely Case
Denial of service (FTP server crash) with potential for limited code execution in constrained environments
If Mitigated
Service disruption with no data compromise if proper network segmentation and exploit mitigations are in place
🎯 Exploit Status
Public exploit code is available on Exploit-DB (ID 48501) demonstrating the buffer overflow with 1500 'A' characters
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.konicaminolta.us/
Restart Required: No
Instructions:
No official patch available. Consider alternative FTP solutions or implement workarounds.
🔧 Temporary Workarounds
Disable FTP Service
windowsStop and disable the Konica Minolta FTP Utility service
sc stop "Konica Minolta FTP Utility"
sc config "Konica Minolta FTP Utility" start= disabled
Network Segmentation
windowsRestrict network access to FTP service using firewall rules
netsh advfirewall firewall add rule name="Block FTP Utility" dir=in action=block protocol=TCP localport=21
netsh advfirewall firewall add rule name="Block FTP Utility" dir=out action=block protocol=TCP localport=21
🧯 If You Can't Patch
- Replace Konica Minolta FTP Utility with a secure alternative FTP server
- Implement strict network access controls to limit FTP service exposure to only trusted systems
🔍 How to Verify
Check if Vulnerable:
Check if Konica Minolta FTP Utility 1.0 is installed and running on port 21Check Version:
Check installed programs in Control Panel or run: wmic product get name,version | findstr /i "konica"Verify Fix Applied:
Verify the FTP service is stopped/disabled or replaced with alternative software📡 Detection & Monitoring
Log Indicators:
- FTP service crash logs
- Unusual large LIST command requests (1500+ characters)
Network Indicators:
- TCP connections to port 21 followed by large payloads
- Pattern of 1500 'A' characters in FTP traffic
SIEM Query:
source="ftp.log" AND (command="LIST" AND length>1000) OR (message="service crashed" AND process="ftp")