Array index error in LightDM (aka Light Display Manager) 1.14.3, 1.16.x before 1.16.6 when the XDMCP server is enabled allows remote attackers to cause a denial of service (process crash) via an XDMCP request packet with no address.Referenceshttps://bugzilla.redhat.com/show_bug.cgi?id=1284574http://www.openwall.com/lists/oss-security/2015/11/22/1https://bugs.launchpad.net/lightdm/+bug/1516831
