USN-3892-1: GDM vulnerability

USN-3892-1: GDM vulnerability

gdm3 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 18.10
• Ubuntu 18.04 LTS

Summary

GDM could give unauthorized access to a different user.

Software Description

• gdm3 – GNOME Display Manager

Details

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

gdm3 – 3.30.1-1ubuntu5.1

Ubuntu 18.04 LTS

gdm3 – 3.28.3-0ubuntu18.04.4

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

• CVE-2019-3825

Source: USN-3892-1: GDM vulnerability