Information
Validate service account before validating token.
Rationale:
If --service-account-lookup is not enabled, the apiserver only verifies that the authentication token is valid, and does not validate that the service account token mentioned in the request is actually present in etcd. This allows using a service account token even after the corresponding service account is deleted. This is an example of time of check to time of use security issue.
Impact:
None
Solution
TBD
Default Value:
By default, OpenShift denies access for any OAuth Access token that does not exist in its etcd data store. OpenShift does not use the service-account-lookup flag.