> On Wed, 19 Mar 2003, Richard B. Johnson wrote:
>
> > Really? How did you do this?
> > Clone my machine-name and domain, I mean? Without -bs in the
> > header? I need to know. This could be exploited and needs
> > to be fixed.
>
> Perhaps:
>
> telnet target.system 25
> enter SMTP commands
> quit
Ah yes! And I just tried it! The target system was the one
that the mail was pretended to come from and it has sendmail
running and will forward from within the domain. So, that
sendmail gets a mail message as though it came directly from
itself so it will forward it.
Cheers,
Dick Johnson
Penguin : Linux version 2.4.20 on an i686 machine (797.90 BogoMips).
Why is the government concerned about the lunatic fringe? Think about it.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/