(RHSA-2012:1378) Important: openstack-keystone security update

Keystone is a Python implementation of the OpenStack
(http://www.openstack.org) identity service API.

It was found that Keystone incorrectly handled authorization failures. If
a client attempted to change their tenant membership to one they are not
authorized to join, Keystone correctly returned a not authorized error;
however, the client was still added to the tenant. Users able to access the
Keystone administrative API could use this flaw to add any user to any
tenant. (CVE-2012-3542)

When logging into Keystone, the user receives a token to use for
authentication with other services managed by Keystone. It was found that
Keystone failed to revoke tokens if privileges were revoked, allowing users
to retain access to resources they should no longer be able to access while
their token remains valid. (CVE-2012-4413)

It was found that the Keystone administrative API was missing
authentication for certain actions. Users able to access the Keystone
administrative API could use this flaw to add, start, and stop services, as
well as list the roles for any user. (CVE-2012-4456)

It was found that Keystone incorrectly handled disabled tenants. A user
belonging to a disabled tenant could use this flaw to continue accessing
resources as if the tenant were not disabled. (CVE-2012-4457)

Red Hat would like to thank Dolph Mathews for reporting CVE-2012-3542 and
CVE-2012-4413.

All users of openstack-keystone are advised to upgrade to these updated
packages, which upgrade openstack-keystone to upstream version 2012.1.2
and correct these issues. After installing the updated packages, the
Keystone service (openstack-keystone) will be restarted automatically.