shadow chown(tty) - problem

Dagmar d'Surreal dagmar at speakeasy.net
Sun Sep 1 15:30:36 PDT 2002


On Sun, 2002-09-01 at 05:00, Richard Lightman wrote:

> I log in, and and run:
> nohup ./spy /dev/vcc/1  /dev/vcc/2  &
> nohup ./spy /dev/vcc/a1 /dev/vcc/a2 &
> 
> Then log out. You log in, and everything you see on terminal 1 appears
> on terminal 2. With a bit more effort, I could get the output to cross
> a network. I own the spy processes, so you cannot kill them - unless
> you are root.

Actually this sort of naughtiness is _exactly_ why devpts was added to
the kernel.  Check the archives of Bugtraq for more information.  (I
should have mentioned this before but I thought someone other than
myself would have known about it)

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