Password Information visible after logging out/visiting virtual terminal

[Gaussian]

Running Ubuntu 18.04, GDM3 & Gnome

Problem: Password information visible on a virtual terminal

Steps to produce:
1. During a regular session (either Gnome or i3 in my case) either log out or switch to the virtual terminal 1 (CRTL-ALT-F1)

Expected outcome:
Seeing GDM login screen

What happens:
Before seeing the GDM login screen a black screen looking like a virtual terminal appears for a fraction of a second. In that screen, all the passwords typed into GDM3 login manager since the last reboot show up visible.

At least one other user affected by this, see:
https://www.reddit.com/r/linuxquestions/comments/a8la8u/password_input_is_shown_on_virtual_terminal_in/
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: GNOME
DistroRelease: Ubuntu 18.04
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-01-28 (704 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
Package: gdm3 3.28.3-0ubuntu18.04.3
PackageArchitecture: amd64
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Tags: wayland-session bionic
Uname: Linux 4.15.0-43-generic x86_64
UpgradeStatus: Upgraded to bionic on 2018-07-03 (183 days ago)
UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo video
_MarkForUpload: True
mtime.conffile..etc.gdm3.custom.conf: 2017-01-29T22:46:42.703829
mtime.conffile..etc.pam.d.gdm-password: 2018-04-12T22:43:41.682803

[Seth Arnold (seth-arnold)]

Hello Gaussian, if you're still seeing this can you please run:

apport-collect 1809567

to attach some package information and logs to this bug?

Thanks

[Gaussian (saku)]

apport information

[Gaussian (saku)]

apport information

[Gaussian (saku)]

apport information

[Gaussian (saku)]

apport information

[Seth Arnold (seth-arnold)]

Thanks

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1803993, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.