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.
References (9)
Core 9
Core References
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/64679
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
Issue Tracking x_refsource_confirm
https://bugzilla.novell.com/show_bug.cgi?id=857303
Mailing List mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2014/01/07/15
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
Mailing List vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html
Vendor Advisory third-party-advisory
x_refsource_secunia
http://secunia.com/advisories/56211
Issue Tracking x_refsource_confirm
https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
Vendor Advisory third-party-advisory
x_refsource_secunia
http://secunia.com/advisories/56423
Scores
EPSS
0.0041
EPSS Percentile
33.2%
Details
Status
published
Products (17)
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.1.1
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.1.2
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.1.3
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.1.4
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.1.5
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.1.6
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.3.0
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.3.1
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.5.0
lightdm_gtk\+_greeter_project/lightdm_gtk\+_greeter
1.5.1
... and 7 more
Published
Jan 23, 2014
Tracked Since
Feb 18, 2026