Bug#732854: lightdm shows a part of my desktop screen as a part of the background of the login screen
On 2013-12-22 16:54:12 +0100, Vincent Lefevre wrote:
> Package: lightdm
> Version: 1.8.5-2
> Severity: grave
> Tags: security
> Justification: user security hole
> Here's what I did:
> 1. Quit me desktop session.
> 2. In lightdm (whose screen appeared correctly), clicked on "Restart".
> 3. Waited for the restart, chose the default Linux kernel...
> First lightdm seemed to be confused by the screen resolution because
> the display of the login box didn't appear at the right place first.
> Note that the machine is a laptop, and I use it at home with a larger
> external screen, but since yesterday morning I'm no longer at home.
> I wonder whether this is related (but note that in step 2, everything
> was OK).
> Then the login box reappeared correctly. However the background was
> still incorrect, with parts of my desktop screen, i.e. private data
> accessible to everyone! There was nothing really private here, but
> there could have been a password visible or other private information
> or whatever.
I haven't seen this issue for several years.
Perhaps this bug could be closed.
Vincent Lefèvre <email@example.com> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)