vsftpd is a lightweight, secure, and highly configurable FTP server software. It was designed to be a replacement for the traditional FTP servers, which were often criticized for their security vulnerabilities. vsftpd was first released in 2000 and has since become a popular choice for many Linux distributions, including Ubuntu, Debian, and CentOS.
The vsftpd 208 exploit is a type of remote code execution (RCE) vulnerability that affects vsftpd versions prior to 2.3.4. The exploit is triggered by a malicious FTP client that sends a crafted EPSV (Extended Passive) command to the FTP server. This command is used to establish a passive FTP connection. vsftpd 208 exploit github link