DNSSEC RSASHA1 Algorithm Deprecated Usage

ID: gcloud-dnssec-keysigning-rsasha1

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,dns,dnssec,gcp-cloud-config

Description

Ensure that Domain Name System Security Extensions (DNSSEC) feature is not using the deprecated RSASHA1 algorithm for the Key-Signing Key (KSK) associated with your DNS managed zone file.

YAML Source

id: gcloud-dnssec-keysigning-rsasha1

info:
  name: DNSSEC RSASHA1 Algorithm Deprecated Usage
  author: princechaddha
  severity: medium
  description: |
    Ensure that Domain Name System Security Extensions (DNSSEC) feature is not using the deprecated RSASHA1 algorithm for the Key-Signing Key (KSK) associated with your DNS managed zone file.
  impact: |
    Using the deprecated RSASHA1 algorithm in DNSSEC configurations can expose DNS infrastructure to vulnerabilities and compromise the integrity and security of DNS data.
  remediation: |
    Update the DNSSEC configuration for each DNS managed zone to use more secure algorithms like RSASHA256 or ECDSAP256SHA256 for the Key-Signing Key (KSK).
  reference:
    - https://cloud.google.com/dns/docs/dnssec-config
  tags: cloud,devops,gcp,gcloud,dns,dnssec,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let managedZone of iterate(template.managedZones)){
      set("managedZone", managedZone)
      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 dns managed-zones list --project $projectId --format="json(name)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud dns managed-zones describe $managedZone --project $projectId --format="json(dnssecConfig)"

    matchers:
      - type: word
        words:
          - 'rsasha1'

    extractors:
      - type: dsl
        dsl:
          - '"Deprecated RSASHA1 algorithm found in DNS managed zone: " + managedZone + " in Project: " + projectId'
# digest: 4a0a00473045022100f1fba22253f98b9a21cc53aa6992c05c36ec882ebaee328c6b76b5ac3c5688b402206dcf925a8f866fe1240ba4fe8c20b80730229c5443fc645041aa23c0c3ca6758:922c64590222798bb761d5b6d8e72950

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/dns/gcloud-dnssec-keysigning-rsasha1.yaml"

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