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USN-3892-1: GDM vulnerability

20 February 2019

GDM could give unauthorized access to a different user.



  • gdm3 - GNOME Display Manager


Burghard Britzke discovered that GDM incorrectly handled certain configurations.
An attacker could possibly use this issue to get unauthorized access to
a different user.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.10
Ubuntu 18.04

After a standard system update you need to reboot your computer to make
all the necessary changes.