Red Hat Security Advisory 2012-1378-01 - Keystone is a Python implementation of the OpenStack 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. 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.
8b912ed60ba4387f304180a802ce43c9829c9309b3f510c6f95aba85ae30cd74Ubuntu Security Notice 1552-1 - Dolph Mathews discovered that OpenStack Keystone did not properly restrict to administrative users the ability to update users' tenants. A remote attacker that can reach the administrative API can use this to add any user to any tenant. Derek Higgins discovered that OpenStack Keystone did not properly implement token expiration. A remote attacker could use this to continue to access an account that has been disabled or has a changed password. Various other issues were also addressed.
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