NetTerm-NetFTPD 4.2.2 suffers from multiple buffer overflows that can cause a denial of service against the server and possibly execute arbitrary commands.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31392/Netterm-NetFTPD4.2.2.txt
Source: https://packetstormsecurity.com/files/31392/Netterm-NetFTPD4.2.2.txt.html