Desktop user security
I am using F21 workstation but I think this is not a fedora specific issue. I recently realized that any user remotely logged-in to a linux machine, can capture/view the desktop of the any other user who is using the GUI.
This is a serious security flaw. How can a user protect against such scenario.
Update 1: Remote user is logged-in as non-sudo user via SSH. I tested it using ffmpeg's x11grab.
Update 2: This happens on F21 LXDE desktop environment. This OS was installed using Fedora-Live-LXDE-x86_64-20-1.iso and then upgraded to F21 using fedup.
Update 3: I have filed a bugreport for this.
what do you mean with remotely logged-in? SSH? as root?
a user logged-in as non-sudo user via SSH
I am sure you want to share more details...
I tested it using ffmpeg's x11grab.
Manage to record x display using ffmpeg's x11grab as root, but not as different user from the one that is running the X display, any more information you can provide