CVE-2025-4872 in FTP Server
Summary
by MITRE • 05/18/2025
A vulnerability, which was classified as critical, was found in FreeFloat FTP Server 1.0. Affected is an unknown function of the component CCC Command Handler. The manipulation leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 06/13/2025
The vulnerability identified as CVE-2025-4872 represents a critical buffer overflow flaw within the FreeFloat FTP Server version 1.0, specifically within the CCC Command Handler component. This type of vulnerability falls under CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The affected software component processes commands through the CCC Command Handler, which serves as a critical interface for handling client requests within the FTP protocol implementation. The buffer overflow occurs when the server fails to properly validate input lengths before copying data into fixed-size buffers, creating opportunities for malicious input to overwrite critical memory segments including return addresses and control data structures.
Remote exploitation of this vulnerability presents significant operational risks as attackers can craft malicious FTP commands that trigger the buffer overflow condition without requiring local system access. The attack vector operates through standard FTP protocol communication channels, making it accessible to any remote attacker who can establish connections to the vulnerable server instance. The disclosure of exploit details to the public community accelerates the threat landscape by providing adversaries with readily available tools to compromise affected systems. This vulnerability directly maps to ATT&CK technique T1190, which describes the exploitation of vulnerabilities in network services, and represents a critical entry point for attackers seeking to gain unauthorized access to systems running the vulnerable FTP server software.
The operational impact of this buffer overflow vulnerability extends beyond simple remote code execution capabilities to encompass complete system compromise potential. Successful exploitation can enable attackers to execute arbitrary code with the privileges of the FTP server process, potentially leading to full system takeover and persistent access. The vulnerability affects the fundamental integrity of the server's command processing mechanism, undermining the security posture of any network infrastructure relying on this particular FTP server implementation. Organizations running FreeFloat FTP Server 1.0 are particularly vulnerable as the software has reached end-of-life status with no official security updates or patches available, leaving systems exposed to this critical flaw.
Mitigation strategies should prioritize immediate deployment of network segmentation controls to restrict FTP service access to trusted networks and implement intrusion detection systems to monitor for exploitation attempts. The most effective long-term solution involves migrating away from the vulnerable FreeFloat FTP Server implementation to supported alternatives such as vsftpd, ProFTPD, or modern enterprise FTP solutions that receive regular security updates. Network administrators should also consider implementing application-layer firewalls and input validation controls to reduce the attack surface, while establishing monitoring protocols to detect anomalous FTP command sequences that may indicate exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar vulnerabilities in other network services and ensure comprehensive protection against similar attack vectors.