OSSN/OSSN-0083

Keystone policy rule "identity:get_identity_providers" was ignored
Keystone policy rule "identity:get_identity_providers" was ignored ---

Summary
A policy rule in Keystone did not behave as intended leading to a less secure configuration than would be expected.

Affected Services / Software
OpenStack Identity Service (Keystone) versions through Mitaka, as well as Newton (<= 10.0.3), and Ocata (<= 11.0.3).

Discussion
Deployments were unaffected by this problem if the default rule was changed or the "get_identity_providers" rule was manually changed to be "get_identity_provider" (singular) in keystone's `policy.json`.

A spelling mistake in the default policy configuration caused these rules to be ignored. As a result operators that attempted to restrict this API were unlikely to actually enforce it.

Recommended Actions
Update Keystone to a minimum version of 12.0.0.0b3. Additionally, this fix has been backported to Ocata (11.0.3) and Newton (10.0.3).

Fix any lingering rules: `identity:get_identity_providers` should be changed to `identity:get_identity_provider`.

Contacts / References
Author: Nick Tait

This OSSN : https://wiki.openstack.org/wiki/OSSN/OSSN-0083

Original LaunchPad Bug : https://bugs.launchpad.net/ossn/+bug/1703369

Mailing List : [Security] tag on openstack-dev@lists.openstack.org

OpenStack Security Project : https://launchpad.net/~openstack-ossg