This whitepaper goes into detail on how to use egg hunting shellcode in order to exploit a BisonWare FTP server.
You can download it from the following link: https://packetstormsecurity.com/files/download/109471/Egg_Hunter_BisonWare_FTP_Server.pdf
Source: https://packetstormsecurity.com/files/109471/Egg-Hunting-Against-BisonWare-FTP-Server.html