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CVE-2025-3375: Critical Buffer Overflow Vulnerability in PCMan FTP Server 2.0.7

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Overview

This report details a critical security vulnerability, CVE-2025-3375, found in PCMan FTP Server 2.0.7. This vulnerability affects the CDUP command handler of the software, leading to a buffer overflow condition. The exploit can be triggered remotely, and its public disclosure potentially exposes any system running the affected version of the software to compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-3375
Severity: Critical (CVSS: 7.3)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

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Product | Affected Versions

PCMan FTP Server | 2.0.7

How the Exploit Works

The vulnerability is triggered when an attacker sends a specially crafted request to the CDUP command handler of the PCMan FTP Server. This request contains an oversized payload that exceeds the buffer capacity of the component, causing it to overflow. This overflow condition can then be exploited to execute arbitrary code or disrupt the normal operation of the software.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This is a simple FTP command that might be used to trigger the buffer overflow:

USER anonymous
PASS anonymous
CDUP /../../../../../../../../../../../../../../[BUFFER OVERFLOW PAYLOAD]

This example is purely conceptual and does not represent an actual exploit. The “[BUFFER OVERFLOW PAYLOAD]” would be replaced with a series of characters designed to overflow the buffer and potentially allow the execution of malicious code.

Mitigation Guidance

To mitigate the vulnerability, users are advised to apply vendor patches as soon as they become available. Until such a patch is released, users may employ Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation measures against potential exploits.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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