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From: Craig Boston <craig@xfoil.gank.org>
To: Terry Lambert <tlambert2@mindspring.com>
Date: Thu, 13 Nov 2003 08:17:41 -0600
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cc: current@freebsd.org
Subject: Re: xscreensaver bug?
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> Absolutely worst case, the root user could log in remotely, gdb
> your screen saver, type "foobar" as the password, and then hack
> the authentication function return value to say "yes, that's the
> correct password for "jqdkf@army.com", and get in without needing
> to have xscreensaver accept the root password.

Or, even easier, log in remotely as root and simply "killall -9 xscreensaver".
I've had to do that a few times myself when I first tried out pam_krb5 and 
learned the hard way that xscreensaver doesn't like it very much (and my user 
account has * in the local password field).

Craig