8:58 a.m.
Hi keycloak users!
I've a question about using scope and resource permissions to protect my resources.
To me it seems that keycloak is granting broader authorization entitlements than I
specified it with the policies & permissions - a security issue from my point of
view.
For example keycloak - according to the entitlement token of a user - grants access to a
resource and ALL its scopes, even if I only specified a permission to access only ONE
scope on that resource for that user (with a policy).
Is It wrong to assume that the user should only have access to the one scope?
Another issue is that keycloak grants access to a resource and ALL its scopes, even if I
only specified a permission to access only that resource for that user (with a policy)
without a scope.
Is the assumption wrong that the user should only know about the resource but not the
scopes?
Or is my understanding of how to handle the authorization entitlements for resources and
their scopes with keycloak wrong?
What would be the best practice to secure the resources and their scopes?
Here I describe the scenario & point to a live example:
_ The scenario _
Created Entities:
User: Marta
Policy: Policy-IsUser-Marta
Scopes: read, write, execute
Resource: resource-a (with all three scopes)
Resource: resource-c (with all three scopes)
Resource-Permission: resource-c -> Policy-IsUser-Marta
Scope-Permission: resource-a + scope read -> Policy-IsUser-Marta
Retrieve entitlements:
Get your (Martas) entitlements token and check the granted permissions - they are:
- resource-a -> read + write + execute
- resource-c -> read + write + execute
What I would expect:
- resource-a -> read
- resource-c -> (no scopes)
_ Sample Project _
I created a sample to see it live in action:
https://github.com/kklimpfi/keycloak-scenarios
It contains a keycloak-migration.json with some sample data (in master realm) + an java
application that retrieves the Permissions.
you can clone it and try it (configure setup script for importing and pass the system
property for the java application to its configuration).
(Using Keycloak-2.5.4.Final standalone on Windows 7, should also work on Linux)
kind regards,
Koloman
10:34 a.m.
On Thu, Mar 9, 2017 at 11:58 AM, KLIMPFINGER Koloman <
Koloman.KLIMPFINGER(a)frequentis.com> wrote:
Hi keycloak users!
I've a question about using scope and resource permissions to protect my
resources.
To me it seems that keycloak is granting broader authorization
entitlements than I specified it with the policies & permissions - a
security issue from my point of view.
For example keycloak - according to the entitlement token of a user -
grants access to a resource and ALL its scopes, even if I only specified a
permission to access only ONE scope on that resource for that user (with a
policy).
Is It wrong to assume that the user should only have access to the one
scope?
Another issue is that keycloak grants access to a resource and ALL its
scopes, even if I only specified a permission to access only that
resource
for that user (with a policy) without a scope.
Is the assumption wrong that the user should only know about the resource
but not the scopes?
Or is my understanding of how to handle the authorization entitlements for
resources and their scopes with keycloak wrong?
What would be the best practice to secure the resources and their scopes?
You are correct. This is an issue with the Entitlement API and Scope-based
Permissions. Created https://issues.jboss.org/browse/KEYCLOAK-4555, sending
a fix shortly.
You should not see this happening if using Authorization API where
evaluation is performed on a per-resource/scope basis.
Will take a look on that repository (just perfect to understand what is
happening) you pointed out and check the results once I have the issue
fixed. Can you watch that JIRA for updates ?
Here I describe the scenario & point to a live example:
_ The scenario _
Created Entities:
User: Marta
Policy: Policy-IsUser-Marta
Scopes: read, write, execute
Resource: resource-a (with all three scopes)
Resource: resource-c (with all three scopes)
Resource-Permission: resource-c -> Policy-IsUser-Marta
Scope-Permission: resource-a + scope read -> Policy-IsUser-Marta
Retrieve entitlements:
Get your (Martas) entitlements token and check the granted permissions -
they are:
- resource-a -> read + write + execute
- resource-c -> read + write + execute
What I would expect:
- resource-a -> read
- resource-c -> (no scopes)
_ Sample Project _
I created a sample to see it live in action:
https://github.com/kklimpfi/keycloak-scenarios
It contains a keycloak-migration.json with some sample data (in master
realm) + an java application that retrieves the Permissions.
you can clone it and try it (configure setup script for importing and pass
the system property for the java application to its configuration).
(Using Keycloak-2.5.4.Final standalone on Windows 7, should also work on
Linux)
kind regards,
Koloman
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keycloak-user mailing list
keycloak-user(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/keycloak-user
2:55 p.m.
Hello Koloman,
As you may have noticed, I have sent a PR with some fixes and improvements
to the policy evaluation engine.
I've used your repository to test things out and I only have one comment.
There you have a resource-c which is granted by a resource-based permission
and for this resource you will be granted with all scopes associated with
the resource. Differently than resource-a, where you have only a
scope-resource permission for a specific scope, which does not imply
granting additional scopes.
If you want to provide more fine-grained permissions to the scopes
associated with resource-c, you can define scope permissions to the scopes
you want to protect.
I think I'm going to review the ENFORCING mode for 3.0 in order to also
include "orphan" scopes when evaluation policies. This may bring some
usability issues as a consequence of a more restrictive permissioning
model. Or we can create a separated enforcement mode for this kind of
stuff, maybe a configuration option on a resource permission, I don't know
....
Regards.
Pedro Igor
On Thu, Mar 9, 2017 at 1:34 PM, Pedro Igor Silva <psilva(a)redhat.com> wrote:
On Thu, Mar 9, 2017 at 11:58 AM, KLIMPFINGER Koloman
<Koloman.KLIMPFINGER@
frequentis.com> wrote:
> Hi keycloak users!
>
> I've a question about using scope and resource permissions to protect my
> resources.
> To me it seems that keycloak is granting broader authorization
> entitlements than I specified it with the policies & permissions - a
> security issue from my point of view.
> For example keycloak - according to the entitlement token of a user -
> grants access to a resource and ALL its scopes, even if I only specified a
> permission to access only ONE scope on that resource for that user (with a
> policy).
> Is It wrong to assume that the user should only have access to the one
> scope?
Another issue is that keycloak grants access to a resource and ALL its
> scopes, even if I only specified a permission to access only that resource
> for that user (with a policy) without a scope.
> Is the assumption wrong that the user should only know about the resource
> but not the scopes?
>
> Or is my understanding of how to handle the authorization entitlements
> for resources and their scopes with keycloak wrong?
> What would be the best practice to secure the resources and their scopes?
>
You are correct. This is an issue with the Entitlement API and Scope-based
Permissions. Created https://issues.jboss.org/browse/KEYCLOAK-4555,
sending a fix shortly.
You should not see this happening if using Authorization API where
evaluation is performed on a per-resource/scope basis.
Will take a look on that repository (just perfect to understand what is
happening) you pointed out and check the results once I have the issue
fixed. Can you watch that JIRA for updates ?
>
> Here I describe the scenario & point to a live example:
>
> _ The scenario _
>
> Created Entities:
> User: Marta
> Policy: Policy-IsUser-Marta
> Scopes: read, write, execute
> Resource: resource-a (with all three scopes)
> Resource: resource-c (with all three scopes)
> Resource-Permission: resource-c -> Policy-IsUser-Marta
> Scope-Permission: resource-a + scope read -> Policy-IsUser-Marta
>
> Retrieve entitlements:
> Get your (Martas) entitlements token and check the granted permissions -
> they are:
>
> - resource-a -> read + write + execute
>
> - resource-c -> read + write + execute
>
> What I would expect:
>
> - resource-a -> read
>
> - resource-c -> (no scopes)
>
> _ Sample Project _
> I created a sample to see it live in action:
> https://github.com/kklimpfi/keycloak-scenarios
>
> It contains a keycloak-migration.json with some sample data (in master
> realm) + an java application that retrieves the Permissions.
> you can clone it and try it (configure setup script for importing and
> pass the system property for the java application to its configuration).
> (Using Keycloak-2.5.4.Final standalone on Windows 7, should also work on
> Linux)
>
> kind regards,
> Koloman
> _______________________________________________
> keycloak-user mailing list
> keycloak-user(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/keycloak-user
>
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2 comments
2 participants
participants (2)
-
KLIMPFINGER Koloman -
Pedro Igor Silva