Stack-based buffer overflow in ppp in SCO Unixware 7.1.3 and 7.1.4, and possibly earlier versions, allows local users to execute arbitrary code via a long argument to the (1) prompt or (2) defprompt command.

Command execution in Sun systems via buffer overflow in the at program.

Inverse query buffer overflow in BIND 4.9 and BIND 8 Releases.

Denial of Service vulnerability in BIND 8 Releases via maliciously formatted DNS messages.

Denial of Service vulnerabilities in BIND 4.9 and BIND 8 Releases via CNAME record and zone transfer.

FTP servers can allow an attacker to connect to arbitrary ports on machines other than the FTP client, aka FTP bounce.