A ServiceAccount deployed in a Tenant Namespace, when granted with PATCH capabilities on its own Namespace, is able to edit it and remove the Owner Reference, breaking the reconciliation of the Capsule Operator and removing all the enforcement like Pod Security annotations, Network Policies, Limit Range and Resource Quota items.
With that said, an attacker could detach the Namespace from a Tenant that is forbidding starting privileged Pods using the Pod Security labels by removing the OwnerReference, removing the enforcement labels, and being able to start privileged containers that would be able to start a generic Kubernetes privilege escalation.
Patches
Patches have been released for version 0.1.3 and all users must upgrade to this release.
Workarounds
N.A.
References
N.A.
For more information
If you have any questions or comments about this advisory:
MaxFedotov Analyst
whatev3n Analyst
A ServiceAccount deployed in a Tenant Namespace, when granted with
PATCHcapabilities on its own Namespace, is able to edit it and remove the Owner Reference, breaking the reconciliation of the Capsule Operator and removing all the enforcement like Pod Security annotations, Network Policies, Limit Range and Resource Quota items.With that said, an attacker could detach the Namespace from a Tenant that is forbidding starting privileged Pods using the Pod Security labels by removing the OwnerReference, removing the enforcement labels, and being able to start privileged containers that would be able to start a generic Kubernetes privilege escalation.
Patches
Patches have been released for version 0.1.3 and all users must upgrade to this release.
Workarounds
N.A.
References
N.A.
For more information
If you have any questions or comments about this advisory: