*** This bug is a security vulnerability ***
You have been subscribed to a public security bug by Seth Arnold (seth-arnold):
When doing `dm-tool lock` the screen locks. Then pressing CTRL+ALT+F7
immediately returns me to my Session without any need to type the
password. When logging in mutliple users I can switch between the users
with CTRL+ALT+F7 and CTRL+ALT+F8 without needing any of the users
passwords.
I tested this with both lightdm-gtk-greeter and slick-greeter and the
behavior is the same for both.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-screensaver (not installed)
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu22
Architecture: amd64
Date: Sat Apr 4 17:05:51 2020
SourcePackage: gnome-screensaver
Symptom: security
Title: Screen locking issue
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ubuntu
Importance: Undecided
Status: New
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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LightDM unlocks without Password
https://bugs.launchpad.net/bugs/1870803
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