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Legacy ABAC permissions are enabled.

Default Severity: high

Explanation

You should disable Attribute-Based Access Control (ABAC), and instead use Role-Based Access Control (RBAC) in GKE.

RBAC has significant security advantages and is now stable in Kubernetes, so it’s time to disable ABAC.

Possible Impact

ABAC permissions are less secure than RBAC permissions

Suggested Resolution

Switch to using RBAC permissions

Insecure Example

The following example will fail the google-gke-use-rbac-permissions check. 

 resource "google_container_cluster" "bad_example" {
    enable_legacy_abac = "true"
 }

Secure Example

The following example will pass the google-gke-use-rbac-permissions check. 

 resource "google_container_cluster" "good_example" {
    # ...
    # enable_legacy_abac not set
    # ...
 }