CVE-2025-3380 in FTP Server
Summary
by MITRE • 04/07/2025
A vulnerability, which was classified as critical, has been found in PCMan FTP Server 2.0.7. Affected by this issue is some unknown functionality of the component FEAT Command Handler. The manipulation leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 04/23/2025
The vulnerability identified as CVE-2025-3380 represents a critical buffer overflow flaw within PCMan FTP Server version 2.0.7, specifically within the FEAT Command Handler component. This classification indicates a severe security weakness that could potentially allow remote code execution and system compromise. The vulnerability resides in the server's handling of the FEAT command, which is used to query server features and capabilities during FTP protocol interactions. The buffer overflow occurs when the server processes malformed input through this command handler, creating an exploitable condition that could be leveraged by remote attackers without requiring authentication or prior access to the system.
The technical nature of this flaw places it squarely within CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory regions. This vulnerability operates at the protocol level where the FTP server's FEAT command handler fails to properly validate input length before processing user-supplied data. When an attacker sends a specially crafted FEAT command with excessive input data, the server's memory management routines become compromised, potentially allowing arbitrary code execution. The remote exploitability aspect means that attackers can trigger this vulnerability from outside the network perimeter, making it particularly dangerous for publicly accessible FTP servers.
The operational impact of this vulnerability extends beyond simple system compromise, as it could enable attackers to gain unauthorized access to sensitive data stored on the FTP server. The exploit being publicly disclosed significantly increases the risk profile, as malicious actors can readily implement attack vectors without requiring advanced exploitation techniques. Organizations running PCMan FTP Server 2.0.7 are particularly vulnerable since the server's architecture does not implement proper input validation or memory boundary checks within the FEAT command processing. This vulnerability could facilitate data exfiltration, system hijacking, or serve as a foothold for further lateral movement within network environments where FTP services are deployed.
Mitigation strategies should prioritize immediate patching of the affected software to address the buffer overflow condition in the FEAT Command Handler. Organizations should implement network segmentation to limit access to FTP services and consider disabling unnecessary FTP server features to reduce attack surface. The implementation of intrusion detection systems can help identify exploitation attempts through anomalous FEAT command patterns, while network monitoring should focus on detecting unusual data flows that may indicate exploitation activity. According to ATT&CK framework, this vulnerability maps to T1190 (Exploit Public-Facing Application) and T1059 (Command and Scripting Interpreter) techniques, as attackers could leverage this flaw to execute commands on compromised systems. Additionally, organizations should conduct comprehensive vulnerability assessments to identify other instances of PCMan FTP Server or similar software that may be running in their environments and ensure all systems are updated to prevent similar exploitation vectors.