| Name | CVE-2014-0979 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 734472 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| lightdm-gtk-greeter (PTS) | buster | 2.0.6-1 | fixed |
| bookworm, bullseye | 2.0.8-2 | fixed |
| sid, trixie | 2.0.8-3 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
https://bugzilla.suse.com/show_bug.cgi?id=857303
[wheezy] - lightdm-gtk-greeter <not-affected> (in Wheezy, lightdm restarts when the greeter crashes, so there's no DoS)