Security updates for Wednesday

Security updates have been issued by CentOS (dbus), Debian (python3.5), Fedora (podofo and roundcubemail), Oracle (dbus, dovecot, jbig2dec, kernel, nodejs:10, nodejs:12, sane-backends, and thunderbird), Red Hat (.NET Core and kernel), SUSE (ansible, ansible1, ardana-ansible, ardana-cluster, ardana-freezer, ardana-input-model, ardana-logging, ardana-mq, ardana-neutron, ardana-octavia, ardana-osconfig, caasp-openstack-heat-templates, crowbar-core, crowbar-openstack, documentation-suse-openstack-cloud, grafana, kibana, openstack-dashboard, openstack-dashboard-theme-HPE, openstack-heat-templates, openstack-keystone, openstack-monasca-agent, openstack-monasca-installer, openstack-neutron, openstack-octavia-amphora-image, python-Django, python-Flask, python-GitPython, python-Pillow, python-amqp, python-apicapi, python-keystoneauth1, python-oslo.messaging, python-psutil, python-pyroute2, python-pysaml2, python-tooz, python-waitress, storm, bind, jasper, java-1_8_0-openjdk, LibVNCServer, libxml2, python-ipaddress, rubygem-bundler, rubygem-puma, samba, slirp4netns, xen, and xrdp), and Ubuntu (firefox and webkit2gtk).