CVE-2014-0979: Lightdm Gtk+ Greeter Project Lightdm Gtk+ Greeter

Low severity, CVSS 2.1. EPSS: 0.4% chance of exploitation in the next 30 days.

The start_authentication function in lightdm-gtk-greeter.c in LightDM GTK+ Greeter before 1.7.1 does not properly handle the return value from the lightdm_greeter_get_authentication_user function, which allows local users to cause a denial of service (NULL pointer dereference) via an empty username.

Affected products

• Lightdm Gtk+ Greeter Project Lightdm Gtk+ Greeter: up to and including 1.7.0; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; version 1.1.5 only; …
• Opensuse Opensuse: version 12.2 only; version 12.3 only; version 13.1 only

Published 2014-01-23. Last modified 2026-06-17.