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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://www.securityfocus.com/bid/64679 ↗
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html ↗
- https://bugzilla.novell.com/show_bug.cgi?id=857303 ↗
- http://www.openwall.com/lists/oss-security/2014/01/07/15 ↗
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html ↗
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html ↗
- http://secunia.com/advisories/56211 ↗
- https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449 ↗
- http://secunia.com/advisories/56423 ↗