This Lock Screen bug is just one of many unfixed security issues. Below is another long-standing issue that also allows one to bypass the lock screen...
https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/49579 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308572 Title: Ubuntu 14.04: security problem in the lock screen To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1308572/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs