X2Go Bug report logs - #287
Linux Mint desktops configured too insecurely for multi-user mode

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Package: x2goserver; Maintainer for x2goserver is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goserver is src:x2goserver.

Reported by: David Fuhrmann <fuhrmann_mail@web.de>

Date: Wed, 7 Aug 2013 05:48:02 UTC

Severity: critical

Tags: confirmed, moreinfo, wontfix

Found in version 4.0.1.6

Done: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Bug is archived. No further changes may be made.

Full log

Message #75 received at 287@bugs.x2go.org (full text, mbox, reply):

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To: 287@bugs.x2go.org, x2go@edhil.net
Subject: Fwd: [X2Go-Dev] Bug#287: x2goserver allows to connect to ALL X server
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-------- Original-Nachricht --------
Betreff: 	[X2Go-Dev] Bug#287: x2goserver allows to connect to ALL X 
server sessions by default
Datum: 	Fri, 16 Aug 2013 14:47:40 +0000 (UTC)
Von: 	Fred Her. <x2go@edhil.net>
Antwort an: 	x2go-dev@lists.berlios.de
An: 	x2go-dev@lists.berlios.de



Actually, this is not an x2go issue, this is a linux mint issue : by
default, there is a "xhost +" command launched at session startup for all
users.

If you type "xhost - ", then you should see the normal behavior again :
userB will get a "no desktop found" message if he try to connect to the x2go
host.

So, the workaround is to remove the "xhost +" command in the Control Panel >
Startup Applications for each user,

or completely remove the /etc/xdg/autostart/mint-xhost-plus.desktop
(but this could come back if the package ubuntu-system-adjustments is
updated)

or change this file to:

[Desktop Entry]
Encoding=UTF-8
Version=1.0
Name=Xhost +
Exec=xhost +
Terminal=false
Type=Application
StartupNotify=false
Terminal=false
X-MATE-Autostart-enabled=false
Hidden=true

note to x2go packages maintainers:
Maybe this should be an option to check/disable when the x2goserver package
is installed?

Or maybe a warning should be issued if "xhost" is set to + when a user
connect?

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