And that's not even an exploit, that's the sysadmin doing it wrong: "If the host system and the jail share the `john' user and you are sharing `/usr/local' as r

And that's not even an exploit, that's the sysadmin doing it wrong: "If the host system and the jail share the `john' user and you are sharing `/usr/local' as read-write between the host and the jail, then ``you are doing it wrong!''."