(RHSA-2012:1557) Moderate: openstack-keystone security, bug fix, and enhancement update

The openstack-keystone packages provide Keystone, a Python implementation
of the OpenStack identity service API, which provides Identity, Token,
Catalog, and Policy services.

The openstack-keystone packages have been upgraded to upstream version
2012.2.1, which provides a number of bug fixes and enhancements over the
previous version. (BZ#883829)

This update also fixes the following security issues:

A flaw in Keystone allowed an attacker with access to the web and network
interfaces to continue using chained tokens linked to tokens that had
expired. This would allow the attacker to continue using the tokens despite
the parent token being expired, giving them continued access to OpenStack
services. (CVE-2012-5563)

It was found that Keystone did not correctly handle users being removed
from tenants when Amazon Elastic Compute Cloud (Amazon EC2) style
credentials (credentials that are issued in the same format as standard
Amazon EC2 credentials) were in use. When a user was removed from a tenant,
they retained the privileges provided by that tenant, allowing them to
access resources they should no longer have access to. (CVE-2012-5571)

Red Hat would like to thank the OpenStack project for reporting these
issues. Upstream acknowledges Anndy as the original reporter of
CVE-2012-5563, and Vijaya Erukala as the original reporter of
CVE-2012-5571.

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