PCMan FTP Server Buffer Overflow Vulnerability in RNFR Command Handler

A critical buffer overflow vulnerability has been identified in PCMan FTP Server version 2.0.7. This issue arises in the RNFR Command Handler, allowing remote exploitation. The vulnerability has been publicly disclosed and could be actively exploited.

Impact

Exploitation of this vulnerability leads to a buffer overflow, which can commonly result in arbitrary code execution or causing a denial-of-service condition.

Reproduction

The vulnerability can be reproduced by sending a crafted RNFR 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.