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.
Metrics
CVSS 2.0 2.1/10
AV:L/AC:L/Au:N/C:N/I:N/A:PAffected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
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/56211Vendor Advisory
- http://secunia.com/advisories/56423Vendor Advisory
- 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
- http://secunia.com/advisories/56211Vendor Advisory
- http://secunia.com/advisories/56423Vendor Advisory
- 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
Timeline
- Published
- Jan 23, 2014
- Last modified
- Jun 17, 2026
- NVD status
- Modified