CVE-2014-0979

Severity: low (CVSS 2.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-01-23 · updated 2026-06-17

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.

Affected products

Lightdm Gtk+ Greeter Project Lightdm Gtk+ Greeter: through 1.7.0; 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6 (+7)
Opensuse: 12.2, 12.3, 13.1

References

http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html
http://secunia.com/advisories/56211
http://secunia.com/advisories/56423
http://www.openwall.com/lists/oss-security/2014/01/07/15
http://www.securityfocus.com/bid/64679
https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
https://bugzilla.novell.com/show_bug.cgi?id=857303
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html

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