PCMan FTP Server Buffer Overflow Vulnerability in HELP Command Handler

A critical buffer overflow vulnerability has been identified in PCMan FTP Server version 2.0.7. This issue arises from an unknown processing flaw in the HELP Command Handler, allowing remote exploitation. The vulnerability has been publicly disclosed and is accompanied by a detailed exploit.

Impact

Exploitation of this vulnerability leads to a buffer overflow, which can commonly result in arbitrary code execution or causing the application to crash.

Reproduction

The vulnerability can be reproduced by sending a crafted HELP command that includes a payload designed to overflow the buffer. This can be done using a FTP client or a custom script that connects to the FTP server on port 21. The payload should be carefully crafted to overwrite the return address and execute arbitrary code.