*** This bug is a duplicate of bug 1806961 ***
https://bugs.launchpad.net/bugs/1806961
** This bug has been marked a duplicate of bug 1806961
Lock can be circumvented by switching tty when using lightdm
** Information type changed from Private Security to Public Security
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https://bugs.launchpad.net/bugs/1824817
Title:
Security breach with CRTL+ALT+F7
Status in lightdm package in Ubuntu:
New
Bug description:
This problem concerns every versions of Ubuntu 18 (Desktop or LTS) :
When I lock my session with the padlock icon, I can open it with
CRTL+ALT+F7 without password.
This is the step to reproduce the problem:
- Install Ubuntu 18 (Desktop or LTS) with the default option.
The default windows manager is gnome
- Install lightdm => the opening window logging will be replaced by
the opening window logging of lightdm
- Open a session
- Lock the session with the padlock icon (in the right upper corner,
click on the down arrow and click on the padlock icon)
- The session seems lock because you can see the opening window
logging wich asks you the password but press on CRTL+ALT+F7 and you
can open the session without password.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: lightdm 1.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
ApportVersion: 2.20.10-0ubuntu13
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 15 15:26:04 2019
InstallationDate: Installed on 2019-04-11 (4 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64
(20181017.3)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
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