What:	Non-anonymous users on some Linux ftpd can run root commands
When:	7/96?
Who:	Cert advisories  ftp://info.cert.org/pub/cert_advisories/
Description:

*NON*-anonymous ftp logins on some versions of Linux use the wrong
bin directory (not /users/ftp/bin) - allowing users to exec regular
bin commands as root.

Test:

[ Use a *user* login on a Linux ftp site ]
quote site exec echo this site is hacked