eks-node-group-remote-access: EKS Node Group Remote Access Configuration

id: eks-node-group-remote-access

info:
  name: EKS Node Group Remote Access Configuration
  author: princechaddha
  severity: high
  description: |
    Ensure that Amazon EKS node groups are configured with appropriate remote access settings to maintain security and enable necessary administrative access.
  impact: |
    Improper remote access configuration in EKS node groups can lead to security vulnerabilities or hinder necessary administrative access, potentially affecting cluster management and troubleshooting capabilities.
  remediation: |
    Configure remote access settings for EKS node groups by specifying appropriate SSH key pairs and source security groups to enable secure administrative access while maintaining security best practices.
  reference:
    - https://www.trendmicro.com/cloudoneconformity/knowledge-base/aws/EKS/eks-node-group-remote-access.html
    - https://docs.aws.amazon.com/eks/latest/userguide/launch-templates.html
  tags: cloud,devops,aws,amazon,eks,aws-cloud-config

variables:
  region: "us-east-1"

flow: |
  code(1)
  for(let clusterName of iterate(template.clusters)){
    set("cluster", clusterName)
    code(2)
    for(let nodegroupName of iterate(template.nodegroups)){
      set("nodegroup", nodegroupName)
      code(3)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      aws eks list-clusters --region $region --query 'clusters[]' --output json

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

  - engine:
      - sh
      - bash
    source: |
      aws eks list-nodegroups --cluster-name $cluster --region $region --query 'nodegroups[]' --output json

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

  - engine:
      - sh
      - bash
    source: |
      aws eks describe-nodegroup --cluster-name $cluster --nodegroup-name $nodegroup --region $region --query 'nodegroup.remoteAccess' --output json

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - '.*'

      - type: word
        words:
          - "null"
        negative: true

    extractors:
      - type: dsl
        dsl:
          - '"EKS node group " + nodegroup + " in cluster " + cluster + " does not have remote access configured"'
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