← Back to team overview

dx-packages team mailing list archive

[Bug 1413790] Re: It's possible to bypasss lockscreen if user is in nopasswdlogin group.

 

** Changed in: lightdm (Ubuntu)
       Status: New => Invalid

** Changed in: lightdm
       Status: New => Invalid

-- 
You received this bug notification because you are a member of DX
Packages, which is subscribed to unity in Ubuntu.
Matching subscriptions: dx-packages
https://bugs.launchpad.net/bugs/1413790

Title:
  It's possible to bypasss lockscreen if user is in nopasswdlogin group.

Status in Light Display Manager:
  Invalid
Status in Unity:
  In Progress
Status in lightdm package in Ubuntu:
  Invalid
Status in unity package in Ubuntu:
  In Progress

Bug description:
  Lightdm should not emit logind "unlock" signal when the user is not
  prompted for a password. This can lead to a security issue:

  # Log-in (unity session).
  # Add the current user to nopasswdlogin group.
  # Lock the sessions.
  # Session indicator->Switch account...
  # "Login" in again.

  Expected behavior:
  The lockscreen is still active.

  Current behavior:
  The session in unlocked.

  We could workaround the issue directly in unity, but IMHO would be
  cleaner to avoid that lightdm is emitting the logind signal.

To manage notifications about this bug go to:
https://bugs.launchpad.net/lightdm/+bug/1413790/+subscriptions