GKE Clusters Without Critical Notifications Enabled

ID: gcloud-gke-notifications-disabled

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,gke,kubernetes,security,monitoring,notifications,gcp-cloud-config

Description

Ensure that critical alert notifications are enabled for your Google Kubernetes Engine (GKE) clusters to receive important Pub/Sub messages about upgrades, security bulletins, and other relevant information. This helps you stay informed about potential risks and opportunities for optimization.

YAML Source

id: gcloud-gke-notifications-disabled

info:
  name: GKE Clusters Without Critical Notifications Enabled
  author: princechaddha
  severity: medium
  description: |
    Ensure that critical alert notifications are enabled for your Google Kubernetes Engine (GKE) clusters to receive important Pub/Sub messages about upgrades, security bulletins, and other relevant information. This helps you stay informed about potential risks and opportunities for optimization.
  impact: |
    Without critical notifications enabled, you may miss important updates about scheduled upgrades, security bulletins, and new GKE version releases, potentially leading to delayed security patches and unplanned downtime.
  remediation: |
    Enable critical notifications for your GKE clusters using:
    gcloud container clusters update CLUSTER_NAME --notification-config=pubsub=ENABLED,pubsub-topic=projects/PROJECT_ID/topics/TOPIC_NAME
  reference:
    - https://cloud.google.com/kubernetes-engine/docs/concepts/cluster-notifications
    - https://www.trendmicro.com/cloudoneconformity/knowledge-base/gcp/GKE/enable-notifications.html
  tags: cloud,devops,gcp,gcloud,gke,kubernetes,security,monitoring,notifications,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let cluster of iterate(template.clusters)){
      cluster = JSON.parse(cluster)
      set("clusterName", cluster.name)
      set("location", cluster.location)
      code(3)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      gcloud projects list --format="json(projectId)"

    extractors:
      - type: json
        name: projectIds
        internal: true
        json:
          - '.[].projectId'

  - engine:
      - sh
      - bash
    source: |
      gcloud container clusters list --project $projectId --format="json(name,location)"

    extractors:
      - type: json
        name: clusters
        internal: true
        json:
          - '.[]'

  - engine:
      - sh
      - bash
    source: |
      gcloud container clusters describe $clusterName --location $location --project $projectId --format="json(notificationConfig.pubsub.enabled)"

    matchers:
      - type: word
        words:
          - "null"

    extractors:
      - type: dsl
        dsl:
          - '"GKE cluster " + clusterName + " in " + location + " of project " + projectId + " does not have critical notifications enabled"'
# digest: 4a0a00473045022071076c1407ad04e4c14023d21296d134488877f3008e4fec21e5f3f2e029095f02210099b205d5014b6da263ec136ed1aa527586e43657564c18edb2c2d9a892f567b5:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "cloud/gcp/gke/gcloud-gke-notifications-disabled.yaml"

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