CVE-2014-0979

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Summary

CVECVE-2014-0979
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2014-01-23 01:55:04 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 2.1 from [email protected]

AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS: 0.000690000 probability, percentile 0.208920000 (date 2026-05-03)

Problem Types: NVD-CWE-Other | n/a

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:L/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.1.1 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.1.2 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.1.3 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.1.4 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.1.5 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.1.6 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.3.0 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.3.1 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.5.0 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.5.1 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.5.2 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.6.0 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter 1.6.1 All All All
Application Lightdm Gtk Greeter Project Lightdm Gtk Greeter All All All All
Operating System Opensuse Opensuse 12.2 All All All
Operating System Opensuse Opensuse 12.3 All All All
Operating System Opensuse Opensuse 13.1 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] Fedora 20 Update: lightdm-gtk-1.6.1-3.fc20 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
LightDM GTK+ Greeter Local Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Security Advisory SA56211 - LightDM GTK+ Greeter NULL Pointer Dereference Denial of Service Vulnerability - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
Bug #1266449 “greeter crashes on empty username” : Bugs : LightDM GTK+ Greeter af854a3a-2127-422b-91ae-364da2661108 bugs.launchpad.net
oss-security - Re: CVE request: lightdm-gtk-greeter - local DOS due to NULL pointer dereference af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
[SECURITY] Fedora 19 Update: lightdm-gtk-1.6.1-3.fc19 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Access Denied af854a3a-2127-422b-91ae-364da2661108 bugzilla.novell.com
openSUSE-SU-2014:0071-1: moderate: update for lightdm-gtk-greeter af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Security Advisory SA56423 - SUSE update for lightdm-gtk-greeter - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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