OpenStack Neutron before 2014.2.4 (juno) and 2015.1.x before 2015.1.1 (kilo), when using the IPTables firewall driver, allows remote authenticated users to cause a denial of service (L2 agent crash) by adding an address pair that is rejected by the ipset tool.
lists.openstack.org/pipermail/openstack-announce/2015-June/000377.html
rhn.redhat.com/errata/RHSA-2015-1680.html
access.redhat.com/errata/RHSA-2015:1680
access.redhat.com/security/cve/CVE-2015-3221
bugs.launchpad.net/neutron/+bug/1461054
bugzilla.redhat.com/show_bug.cgi?id=1232284
git.openstack.org/cgit/openstack/neutron/commit/?id=9ff6138c47c95034ba845e9448ddffd147b51f38
nvd.nist.gov/vuln/detail/CVE-2015-3221
opendev.org/openstack/neutron
web.archive.org/web/20200228084753/www.securityfocus.com/bid/75368