ACM Certificate Validation Check

ID: acm-cert-validation

Severity: medium

Author: princechaddha

Tags: cloud,devops,aws,amazon,acm,aws-cloud-config

Description

Ensure ACM SSL/TLS certificates are properly validated during issue or renewal, indicating secure communication channels.

YAML Source

id: acm-cert-validation
info:
  name: ACM Certificate Validation Check
  author: princechaddha
  severity: medium
  description: |
    Ensure ACM SSL/TLS certificates are properly validated during issue or renewal, indicating secure communication channels.
  impact: |
    Lack of validation may allow unauthorized certificates, leading to potential man-in-the-middle attacks or data breaches.
  remediation: |
    Use AWS ACM for certificate provisioning and ensure domain validation steps are correctly followed for each certificate issued or renewed.
  reference:
    - https://docs.aws.amazon.com/acm/latest/userguide/gs-acm-validate.html
  metadata:
    max-request: 2
  tags: cloud,devops,aws,amazon,acm,aws-cloud-config
variables:
  region: "us-east-1"

flow: |
  code(1)
  for(let arns of iterate(template.certificatearns)){
    set("certificatearn", arns)
    code(2)
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      aws acm list-certificates --region $region --output json

    extractors:
      - type: json
        name: certificatearns
        internal: true
        json:
          - '.CertificateSummaryList[] | .CertificateArn'

  - engine:
      - sh
      - bash
    source: |
         aws acm describe-certificate --region $region --certificate-arn $certificatearn --query 'Certificate.Status'

    matchers:
      - type: word
        words:
          - "PENDING_VALIDATION"

    extractors:
      - type: dsl
        dsl:
          - '"The issue/renewal request for " + certificatearn + " SSL/TLS certificate was not validated"'
# digest: 4b0a004830460221009c4c06dcc6415ac0bc7fc6357f399c97951c8c2af78cfd03f46c903b41586eb6022100e250115449f872d9360678566e7f3457e86e96cb1ad4f24007deb8309f810b3d: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/aws/acm/acm-cert-validation.yaml"

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