** Changed in: unity/7.2
Milestone: 7.2.5 => 7.2.6
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https://bugs.launchpad.net/bugs/1413790
Title:
It's possible to bypasss lockscreen if user is in nopasswdlogin group.
Status in Unity:
Fix Released
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]
A user is presented with a password dialog even if a member of the
nopasswdlogin group (and may not have a password).
[TEST CASE]
(1) Create a test user.
(2) Add the test user to the nopasswdlogin group.
(3) Log in to a Unity session using that acocunt.
(4) Lock the screen.
(5) Attempt to unlock the screen: no password prompt should be presented.
[REGRESSION POTENTIAL]
Conceivably allowing a login with no authentication could present
unexpected vulnerabilities in which unforseen code paths also exercise
this function. Care has been taken by the developer to avoid such
cases.
[OTHER INFO]
The fix for Ubuntu 14.04 LTS was cherry picked from the Ubuntu "Vivid
Vervet" dev release where it has been in production use for some time
without apparent regression.
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