touch-packages team mailing list archive

[James Hunt <1345505@xxxxxxxxxxxxxxxxxx>]

I've found a way to trigger this without needing to suspend (which
hopefully will make it easier to debug :-)...

1) Open a terminal.
2) Run: "sleep 5 && gnome-terminal --maximize"
3) Quickly (before 5 seconds has elapsed), press "CTRL+l" to lock the screen.
4) Don't touch keyboard or mouse for about 10 seconds to give the lock screen time to dim the screen to black.
5) *Before* the cursor disappears (normally happens about 2 seconds after the screen is fully black), tpe random characters or hold down a key continually until the lock screen is displayed again.
6) Either delete the characters in the password box and reenter you actual password, or press return and enter you actual password.
7) Observe that the maximised gnome-terminal that is now revealed shows atleast a subset of the keys you typed when the screen was locked.

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https://bugs.launchpad.net/bugs/1345505

Title:
  lock screen leaks keystrokes to window "behind" greeter

Status in “unity” package in Ubuntu:
  New

Bug description:
  When my machine comes out of suspend, I am shown the lightdm greeter.
  However, occasionally I am unable to enter my password since the
  password box is not given focus. Clicking with the mouse in the
  password box also doesn't help.

  I've found that clicking the settings cog (top right) twice allows me
  to regain control of the focus and enter my password.

  Aside from the inability to enter my password in the password box, it
  seems that simply typing my password (or in fact any text) results in
  those keystrokes being passed to the full-screen window *behind* the
  greeter. This should not be possible and is a security issue: imagine
  if my full-screen console was connected to a remote shared session, or
  was running an irc client, etc.).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: lightdm 1.11.4-0ubuntu1
  ProcVersionSignature: Ubuntu 3.16.0-4.9-generic 3.16.0-rc5
  Uname: Linux 3.16.0-4-generic x86_64
  ApportVersion: 2.14.4-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jul 20 09:08:47 2014
  InstallationDate: Installed on 2014-04-11 (99 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140409)
  SourcePackage: lightdm
  UpgradeStatus: Upgraded to utopic on 2014-05-08 (72 days ago)

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