{"id":87240,"date":"2026-07-19T13:03:07","date_gmt":"2026-07-19T13:03:07","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-3682-critical-buffer-overflow-vulnerability-in-pcman-ftp-server-2-0-7","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3682-critical-buffer-overflow-vulnerability-in-pcman-ftp-server-2-0-7\/","title":{"rendered":"CVE-2025-3682: Critical Buffer Overflow Vulnerability in PCMan FTP Server 2.0.7<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

This report discusses a critical vulnerability, identified as CVE-2025-3682, found in the PCMan FTP Server 2.0.7. This vulnerability affects the PASV Command Handler component of the software and can be exploited remotely, leading to potential system compromise or data leakage. Given the severity of the weakness and the fact that the exploit is already public, it is essential to understand and mitigate this vulnerability promptly.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-3682
\nSeverity: Critical (CVSS 7.3)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise and potential data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

PCMan FTP Server | 2.0.7<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability arises from a buffer overflow condition within the PASV Command Handler. An attacker can exploit this by sending a specially crafted PASV command that exceeds the buffer limit. This overflow condition can corrupt adjacent memory blocks, potentially allowing the execution of arbitrary code or causing the system to crash.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of a malicious FTP command that might be used to exploit this vulnerability:<\/p>\n

USER anonymous\nPASS anonymous\nPASV AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA<\/code><\/pre>\n
The `A` characters above represent an oversize string intended to overflow the buffer in the PASV Command Handler. In a real attack, this string would likely contain malicious executable code.<\/p>\n
Recommended Mitigations<\/strong><\/p>\n
The immediate mitigation for this vulnerability is to apply the vendor-provided patch. If the patch cannot be applied immediately, using Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) can serve as a temporary mitigation. This can help detect and prevent exploitation attempts until the patch can be applied. It is crucial to keep all systems updated and frequently monitor for any unusual activity.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview This report discusses a critical vulnerability, identified as CVE-2025-3682, found in the PCMan FTP Server 2.0.7. This vulnerability affects the PASV Command Handler component of the software and can be exploited remotely, leading to potential system compromise or data leakage. Given the severity of the weakness and the fact that the exploit is already […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87240","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t