https://bugs.kde.org/show_bug.cgi?id=523583
Bug ID: 523583
Summary: Switching users exposes a tty framebuffer, keylogging
everything typed on the first user session including
passwords. Also causes the display to end when using
ctrl c.
Classification: Plasma
Product: plasma-login-manager
Version First 6.7.3
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: ---
DESCRIPTION
After switching users, if I use the ctrl + alt + f1-f12 key combo to switch
back to the first user, for a brief second a text tty will flash on screen for
about half a second. Anything typed as the first user will appear in the tty,
including the user password to unlock the screen (i temporaily changed it to
"test" for the video) The tty doesn't keylog any text typed before the second
user was started.
Attempting to restart through plasma gui won't work on the first user and it
will only result in a black screen. I have to switch to another user to reboot
properly. Using ctrl + c as the first user will crash the display sending me to
either plasmalogin or the second user if it's still logged in. The bugs do not
affect the second user. Trying to log back into the first user through
plasmalogin will result in a never ending frozen screen. I've been able to
consistently reproduce the bug on my system.
The bug doesn't persist after switching back to sddm.
STEPS TO REPRODUCE
1. Plasmalogin
2. Switch users through plasma gui
3. Use ctr alt f1-f12 to switch back and forth to the first user
OBSERVED RESULT
After switching the first user, a text tty apears (nk login prompt) for a split
second. Anything that was typed in the user's display session after the second
user was started will appear on the tty before the display session appears.
EXPECTED RESULT
SOFTWARE/OS VERSIONS
Operating System (available in the Info Center app, or by running `kinfo` in a
terminal window):
KDE Plasma Version: 6.7.3
KDE Frameworks Version: 6.28.0
Qt Version: 6.11.1
Plasma login manager 6.7.3-1
ADDITIONAL INFORMATION
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