Buffer overflows in TYPSoft FTP Server 0.78 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long USER, PASS, or CWD command.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-1022
http://www.synnergy.net/Archives/Advisories/dethy/typsoft-ftpd.txt