Date: Mon, 2 Dec 2019 17:50:43 +0000 From: Leonid Isaev <leonid.isaev@...x.com> To: oss-security@...ts.openwall.com Subject: Re: virtual consoles On Mon, Dec 02, 2019 at 06:28:12PM +0100, Solar Designer wrote: > On Mon, Dec 02, 2019 at 08:56:38AM -0800, Tavis Ormandy wrote: > > Regardless of your position, this is certainly possible on desktop Linux > > too, 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 > > > > (note: object paths may vary by distro, change the 2 to a different > > number if you're already on VT2, or seat0 if you're on a different seat) > > If this in fact works over SSH and from a user account different than Yes, it does. > Why does this functionality even exist? Because of the same reason why I have dbus on a Spark compute node: systemd :) > Maybe simply drop the misfeature? That would break (at least) systemd user sessions I suppose... Sincerely, L.
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