Re: Fw: Anonymous Qmail Denial of Service

[Mate Wierdl]

On Mon, Jan 04, 1999 at 01:03:14PM +0000, Sam wrote:
> 
> > : :    % /var/qmail/bin/qmail-queue
> > : :    ^Z
> > : :    Suspended
> > : :    % kill -9 %1
> > : :    [1]    Killed                 /var/qmail/bin/qmail-queue
> > : :    %
> > : :
> > : :There will be one more zero-length file, owned by qmail, without
> > : :any user identification whatsoever.  It is an exercise for the
> 
> qmail-queue is a setuid program.  Did UNIX change, while I was out of town,
> and you can now send signals to processes of different userids?

Not only that, but the above works w/o the -9 flag.
-- 
---
Mate Wierdl | Dept. of Math. Sciences | University of Memphis