Stack-based buffer overflow in the SFTP subsystem in GoodTech SSH 6.4 allows remote authenticated users to execute arbitrary code via a long string to the (1) open (aka SSH_FXP_OPEN), (2) unlink, (3) opendir, and other unspecified parameters.

Multiple stack-based buffer overflows in GoodTech SMTP server 5.16 allow remote attackers to execute arbitrary code via (1) a RCPT TO command with a long DNS name, or (2) a large number of RCPT TO commands with a long e-mail name arugment in the last command.

GoodTech SMTP Server 5.14 allows remote attackers to cause a denial of service (application crash) via a RCPT TO command with an invalid argument, as demonstrated using an "A" character.

Buffer overflow in the administration web server for GoodTech Telnet Server 4.0 and 5.0, and possibly all versions before 5.0.7, allows remote attackers to execute arbitrary code via a long string to port 2380.

GoodTech FTP server 3.0.1.2.1.0 and earlier allows remote attackers to cause a denial of service via a flood of connections to the server, which causes it to crash.

GoodTech FTP server allows remote attackers to cause a denial of service via a large number of RNTO commands.

Buffer overflow in GoodTech Telnet Server NT allows remote users to cause a denial of service via a long login name.