The Control Panel applet in WFTPD and WFTPD Pro 3.21 R1 and R2 allows remote authenticated users to cause a denial of service (crash) via a long FTP command.
ArGoSoft FTP Server before 1.4.1.6 allows remote authenticated users to cause a denial of service (crash) via a SITE PASS command with a long password parameter, which causes the database to be corrupted.