Allowed Namespaces

Type: Rule
ID: k8s-namespace-white-listed-namespaces
Source: v2/rules/k8s/namespace/white-listed-namespaces.yaml
Rego Source: white-listed-namespaces.rego
Labels: K8s, Namespace

Verify only namespaces specified in the Allowed List are allowed within the cluster.

note

This rule requires K8s Namespace Discovery Evidence. See here for more details.

tip

Signed Evidence for this rule IS NOT required by default but is recommended.

warning

Rule requires evaluation with a target. Without one, it will be disabled unless the --all-evidence flag is provided.

Usage example

uses: k8s/namespace/white-listed-namespaces@v2
with:
  namespaces:
    - default

Mitigation

Ensures that only approved namespaces are allowed within the Kubernetes cluster, reducing the risk of unauthorized or misconfigured namespaces.

Description

This rule ensures that only namespaces specified in the whitelist are allowed within the Kubernetes cluster. It performs the following steps:

1. Iterates over the namespaces in the cluster.
2. Checks each namespace against the whitelist specified in the with.namespaces configuration.
   • If a namespace is not in the whitelist, the rule flags it as a violation.

Evidence Requirements:

• Evidence must be provided by the Scribe Platform's CLI tool through scanning Kubernetes resources.

Evidence Requirements

Field	Value
signed	False
content_body_type	generic
target_type	data
predicate_type	http://scribesecurity.com/evidence/discovery/v0.1
labels	- asset_type=namespace - platform=k8s

Input Definitions

Parameter	Type	Required	Description
namespaces	array	False	A list of allowed namespaces.