services / Azure / Kubernetes RoleBindings (AKS)

In-cluster Kubernetes RBAC RoleBinding objects that bind subjects (users, groups, service accounts) to Roles/ClusterRoles within an AKS managed cluster, governing who can perform which actions in the cluster.

Cluster RBAC is the primary access-control mechanism for the cluster; binding a subject to a privileged role (e.g. cluster-admin) yields full control of the cluster and its workloads/data.

Microsoft.​ContainerService/​managedClusters/​rbac.​authorization.​k8s.​io/​rolebindings/​write

Creating/updating a RoleBinding lets an attacker bind any subject (including their own identity) to any role up to cluster-admin, the canonical Kubernetes privilege-escalation primitive.

Risks

1. Privilege escalation (CRITICAL)

Scope: CRITICAL

This privilege may grant access to sensitive data from a significant fraction of organizational functions, allow interruption of critical organizational services, or its exploit could lead to significant privilege escalation.

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