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From "Jason Gustafson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-5638) Inconsistency in consumer group related ACLs
Date Mon, 31 Jul 2017 21:38:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-5638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16108007#comment-16108007

Jason Gustafson commented on KAFKA-5638:

[~vahid] Interesting point. Maybe we could just extend the current behavior? If the user has
{{Describe(Cluster)}}, we can list all groups as we do currently. Otherwise, we can restrict
the set of groups to only those that the user has {{Describe(Group)}} permission for?

> Inconsistency in consumer group related ACLs
> --------------------------------------------
>                 Key: KAFKA-5638
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5638
>             Project: Kafka
>          Issue Type: Bug
>          Components: security
>    Affects Versions:
>            Reporter: Vahid Hashemian
>            Assignee: Vahid Hashemian
>            Priority: Minor
>              Labels: needs-kip
> Users can see all groups in the cluster (using consumer group’s {{--list}} option)
provided that they have {{Describe}} access to the cluster. It would make more sense to
modify that experience and limit what is listed in the output to only those groups they have {{Describe}} access
to. The reason is, almost everything else is accessible by a user only if the access is specifically
granted (through ACL {{--add}}); and this scenario should not be an exception. The potential
change would be updating the minimum required permission of {{ListGroup}} from {{Describe (Cluster)}}
to {{Describe (Group)}}.
> We can also look at this issue from a different angle: A user with {{Read}} access
to a group can describe the group, but the same user would not see anything when listing groups
(assuming there is no {{Describe}} access to the cluster). It makes more sense for this
user to be able to list all groups s/he can already describe.
> It would be great to know if any user is relying on the existing behavior (listing all
consumer groups using a {{Describe (Cluster)}} ACL).

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