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[Launchpad Bug Tracker <1370017@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package unity - 7.2.4+14.04.20141217-0ubuntu1

---------------
unity (7.2.4+14.04.20141217-0ubuntu1) trusty; urgency=medium

  [ Andrea Azzarone ]
  * Share lockscreen password between screens (lp: #1308540)
  * Allow a distinct pam config file for greeter and for lock-screen.
    (lp: #1305440)
  * Add an arrow activator in the lockscreen. (lp: #1332509)
  * Make sure GetScreenGeometry returns the correct value (lp: #1374785).
  * unmapped all windows prior to shutdown (lp: #1370017) (lp: #1375271)

  [ Brandon Schaefer ]
  * fix tooltip for the "Show Desktop / Restore Windows" icon in the Alt-Tab
    switcher (lp: #1237132)
  * Use CONFIG instead of CACHE to store the first_run.stamp (lp: #1328677)

  [ Eleni Maria Stea ]
  * LayoutSystem: make sure the exposed open windows are displayed in the
    preserved order (lp: #1349281).

  [ handsome_feng ]
  * added support for getting the distro name from /etc/os-release
    (lp: #1329584)

  [ Iain Lane ]
  * When grabbing keys, try prefixing "XF86" if the key isn't found. GNOME
    gives us unprefixed keys sometimes (lp: #1302885).

  [ Marco Trevisan (Treviño) ]
  * make the Launcher icon count badge width depend on the text value width
    and scaling (lp: #1353070) (lp: #1354498) (lp: #796527) (lp: #1066971)
    (lp: #1361713)
  * DecoratedWindow: make edges independent from borders and properly update
    them on actions change (lp: #1276177), (lp: #1299741), (lp: #1301776),
    (lp: #1324104), (lp: #1364225), (lp: #1373695)
  * Lockscreen: scale the UI elements based on current monitor scaling
    (lp: #1292218)
  * UnityScreen: when filtering out windows in spread, make sure we unscale
    them (lp: #1316265).
  * PanelMenuView: ensure that proper window tiles and buttons are shown at
    the right place (lp: #1384910) (lp: #1384958) (lp: #1385285)
  * SearchBar, ActionButtons, IconRenderer: include the font scaling when
    scaling textual items (lp: #1332947) (lp: #1361751) (lp: #1362162)
    (lp: #1362346).
  * ApplicationLauncherIcon: make sure we close the dash if DnD is accepted
    and the application window is about to be focused (lp: #1350331).
  * SwitcherView: set progress on icon render args (lp: #1361679).
  * LockScreenController: wait for the primary shield to get the grab
    before setting the session locked (lp: #1368427) (lp: #1371764).
  * added decorations to windows in non-focused workspaces (lp: #1383468)

  [ Stephen M. Webb ]
  * updated the unity(1) manpage to match the actual command (lp: #1059275)
  * bumped package version to match upstream

  [ Marco Trevisan (Treviño) ]
  * Preparing for unity 7.2.4
 -- Ubuntu daily release <ps-jenkins@xxxxxxxxxxxxxxxxxxx>   Wed, 17 Dec 2014 20:52:10 +0000

** Changed in: unity (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1370017

Title:
  Unity Lockscreen shows unlocked desktop while shutting down

Status in Unity:
  Fix Committed
Status in Unity 7.2 series:
  In Progress
Status in unity package in Ubuntu:
  Fix Released
Status in unity source package in Trusty:
  Fix Released

Bug description:
  [Impact and Test Case]

  Steps to reproduce:
  1 - Lock the screen
  2 - From the lockscreen, tell the computer to shut down / restart

  Expected behavior:
  * Session programs are closed while the screen is still locked
  * During shutdown, no user interaction is possible

  Observed behavior:
  * The lockscreen is gone immediately, with the rest of compiz (e.g. window decorations are not present)
  * But it's possible to interact with programs that are still running in the session for about 3 seconds

  Observed on an updated Trusty machine, running unity version
  7.2.2+14.04.20140714-0ubuntu1.1

  I consider this bug a security vulnerability because during those 3
  seconds it could be possible to access and interact with sensitive
  information.  Yes, it's short, but you could take a picture or even rm
  -rf / if there happened to be a root console available.

  [Regression Potential]

  An improper implementation of the fix for this issue could result in
  an indefinite hang during system shutdown, or could result in the
  problem not being completely fixed and the security vulnerability
  continuing.

  Neither appear to be the case.

  [ Other Info ]

  The Ubuntu 14.04 LTS SRU has been cherry-picked from upstream Unity
  where it has been in development-level production code in Ubuntu
  'Vivid Vervet' development release for a few months and has not
  display additional problems.

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