Looks to me like the user is in the "nopasswdlogin" group. Please remove the user from that group and see if the problem is resolved.
Thanks! ** Changed in: shadow (Ubuntu) Status: New => Incomplete ** Information type changed from Private Security to Public Security -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to shadow in Ubuntu. https://bugs.launchpad.net/bugs/1424206 Title: Login into the password set account without asking password during boot up. Status in shadow package in Ubuntu: Incomplete Bug description: Ubuntu 14.04 on booting login's into one of the account without asking for the password. though a password is set for all accounts. See at this link http://youtu.be/vXkAOkW-aUo ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: login 1:4.1.5.1-1ubuntu9 ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13 Uname: Linux 3.13.0-45-generic i686 ApportVersion: 2.14.1-0ubuntu3.7 Architecture: i386 CurrentDesktop: Unity Date: Sat Feb 21 21:13:31 2015 InstallationDate: Installed on 2015-02-07 (13 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2) SourcePackage: shadow UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1424206/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp