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Date: Tue, 3 Dec 2019 07:12:05 -0800
From: Tavis Ormandy <taviso@...il.com>
To: oss-security@...ts.openwall.com
Subject: Re: virtual consoles

On Tue, Dec 03, 2019 at 12:34:14PM +0000, Simon McVittie wrote:
> On Mon, 02 Dec 2019 at 08:56:38 -0800, Tavis Ormandy wrote:
> > unprivileged users can start a new X server and switch virtual
> > console, even over ssh.
> > 
> > e.g.
> > 
> > $ dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1/seat/seat0 org.freedesktop.login1.Seat.SwitchTo uint32:2
> 
> If a uid who is not already the owner of the current VT on the seat can
> do this, then that's probably a bug? If you think so, please report it
> to the maintainers of logind (which is the component that would have to
> change to address this).
> 

I sent a mail to the systemd-security list, maybe they'll agree and just
change it.

Tavis.


-- 
-------------------------------------
taviso@....lonestar.org | finger me for my pgp key.
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