CVE-2025-4788
📋 TL;DR
CVE-2025-4788 is a critical buffer overflow vulnerability in FreeFloat FTP Server 1.0's DELETE command handler that allows remote attackers to execute arbitrary code or crash the service. This affects all deployments of FreeFloat FTP Server 1.0 with the vulnerable component enabled. The vulnerability is remotely exploitable without authentication.
💻 Affected Systems
- FreeFloat FTP Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Service disruption through denial of service (crash) or limited code execution for initial foothold.
If Mitigated
Contained impact through network segmentation and exploit prevention controls.
🎯 Exploit Status
Public exploit code is available, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Consider migrating to a supported FTP server solution.
🔧 Temporary Workarounds
Disable DELETE command
windowsConfigure FreeFloat FTP Server to disable or restrict DELETE command functionality
Configure through FreeFloat FTP Server admin interface
Network segmentation
allRestrict FTP server access to trusted networks only
Configure firewall rules to limit FTP port (21) access
🧯 If You Can't Patch
- Replace FreeFloat FTP Server with a maintained alternative like FileZilla Server, vsftpd, or ProFTPD
- Implement network-based intrusion prevention systems (IPS) with buffer overflow detection rules
🔍 How to Verify
Check if Vulnerable:
Check if FreeFloat FTP Server 1.0 is installed and running on port 21Check Version:
Check FreeFloat FTP Server interface or installation directory for version informationVerify Fix Applied:
Verify FreeFloat FTP Server has been removed or replaced with a secure alternative📡 Detection & Monitoring
Log Indicators:
- Multiple failed DELETE commands
- Unusual DELETE command patterns
- FTP service crash logs
Network Indicators:
- Excessive DELETE commands to FTP server
- Buffer overflow patterns in FTP traffic
SIEM Query:
source="ftp.log" AND command="DELETE" AND (size>threshold OR pattern="overflow")🔗 References
- https://fitoxs.com/exploit/exploit-cd619c9271a231511f4fa2de1cf569b7040376a5cfe23dc6060884c32638254e.txt
- https://vuldb.com/?ctiid.309097
- https://vuldb.com/?id.309097
- https://vuldb.com/?submit.572476
- https://fitoxs.com/exploit/exploit-cd619c9271a231511f4fa2de1cf569b7040376a5cfe23dc6060884c32638254e.txt
