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GNOME Wants To Sandbox Applications Too

GNOME

Published on 06 February 2013 08:39 AM EST
Written by Michael Larabel in GNOME
13 Comments

As another item that was discussed last week in Brussels during the GNOME Developer Hackfest is sandboxing of GNOME applications. GNOME developers already decided they want applications written in JavaScript but as another security measure they want to begin sandboxing applications.

In writing about the Hackfest prior to FOSDEM 2013, Alexander Larsson wrote on his blog about their new proposed security process. A fully sandboxed application would not even be able to mount the user's home directory in full. There's also talk of implementing an Intents system similar to Android for providing services like file picking, photo access, and photo sharing through the use of DBus.
The sandbox model goes hand-in-hand with the isolation model of app deployment, in the sense that whatever the app should not be able to do it will not even see. So, for a fully sandboxed app we will not even mount in the users home directory in the app namespace, rather than not having access rights to it. (We will of course also offer applications with unlimited sandboxes so that existing apps can run.)

In order to talk with the sandboxes app we need a IPC model that handles the domain transition between the namespaces. This implies the kernel being involved, so we have been looking (again) at getting some form of dbus routing support into the kernel. Hopefully this will work out this time.

Unfortunately we also need IPC for the Xserver, which is very hard to secure. We’ve decided to just just ignore this for now however, as it turns out Wayland is a very good fit for this, since it naturally isolates the clients.

We also talked about implementing something similar to the Intents system in android as a way to allow sandboxed applications to communicate without necessarily knowing about each other. This essentially becomes a DBus service which keeps a registry of which apps implements the various interfaces we want to support (e.g. file picking, get-a-photo, share photo) and actually proxies the messages for these to the right destination. We had a long discussion about the name for these and came up with the name “Portals”, reflecting the domain-transition that these calls represent.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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