(RHSA-2014:0899) Moderate: openstack-neutron security, bug fix, and enhancement update

The openstack-neutron packages provide Openstack Networking (neutron), the
virtual network service.

OpenStack Networking (neutron) is a pluggable, scalable, and API-driven system
that provisions networking services to virtual machines. Its main function is to
manage connectivity to and from virtual machines.

It was discovered that an authenticated user could add a security group rule
with an invalid CIDR causing the openvswitch-agent process to fail and prevent
further rules from being applied. (CVE-2014-0187)

It was discovered that an authenticated user could add an IPv6 private subnet to
an L3 router causing L3-agent to break in a way that prevents further IPv4
addresses from being attached. Removal of the faulty network can only be done
directly at the database level. Only Neutron setups using IPv6 and L3-agent are
affected by this issue. (CVE-2014-4167)

This update also fixes several bugs and adds enhancements:

• Previously, running ‘cloud-init’ resulted in each instance sending requests to
  the metadata agent, which in turn queried Networking server.
  Consequently, booting multiple concurrent instances resulted in metadata agent
  queries producing heavy load for ‘neutron-server’.
  This update addresses this issue by implementing a short lifetime cache for the
  metadata agent. Metadata agent now only queries Networking when data is not
  present in its cache, with the result of decreased load on Networking server
  during ‘cloud-init’ within instances. (BZ#1101494).

• With this update, Networking (neutron) packages now update the
  ‘/etc/sudoers.d/neutron’ file. Consequently, any local changes have been
  relocated to the ‘/etc/sudoers.d/neutron.rpmsave’ file, and will need to be
  merged back manually.
  To avoid the need for manual updates in future, please apply local changes in a
  separate ‘sudoers.d’ file. (BZ#1115406)

• Previously, Networking would fail to reliably communicate with Qpid. This
  behavior was due to an incorrect message subject set in the Qpid layer used by
  Networking.
  This update addresses this issue by setting a correct subject when sending a
  Qpid message. As a result, Networking now works reliably with the new Qpid
  server. (BZ#1108549)

All openstack-neutron users are advised to upgrade to these updated packages,
which correct these issues and add these enhancements.