Red Hat Security Advisory 2013-0708-01 - The openstack-keystone packages provide Keystone, a Python implementation of the OpenStack identity service API, which provides Identity, Token, Catalog, and Policy services. It was found that Keystone did not correctly handle revoked PKI tokens, allowing users with revoked tokens to retain access to resources they should no longer be able to access. A flaw was found in the way Keystone handled tenant names in token requests. A request containing an excessively long tenant name could cause Keystone to consume a large amount of CPU and memory. With this update, the maximum HTTP request size is limited to 112k. This can be changed via the "max_request_body_size" option in "/etc/keystone/keystone.conf".
d3684c547efc8d0c630d7a4cacf91ff67bf5c34699d87d171be83b7f0262b58eUbuntu Security Notice 1772-1 - Guang Yee discovered that Keystone would not always perform all verification checks when configured to use PKI. If the keystone server was configured to use PKI and services or users requested online verification, an attacker could potentially exploit this to bypass revocation checks. Keystone uses UUID tokens by default in Ubuntu.
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