Erik Olof Gunnar Andersson with Blizzard Entertainment reported a
vulnerability in Neutron's iptables firewall module. By setting a
destination port in a security group rule along with a protocol which
doesn't support that option (for example, VRRP), an authenticated user
may block further application of security group rules for instances
from any project/tenant on the compute hosts to which it's applied.
Only deployments using the iptables security group driver are