azure-redis-tls-version-outdated: Azure Redis Cache TLS Version Not Latest

id: azure-redis-tls-version-outdated
info:
  name: Azure Redis Cache TLS Version Not Latest
  author: princechaddha
  severity: medium
  description: |
    Ensure that all your Microsoft Azure Redis Cache servers are using the latest available version of TLS encryption protocol in order to enhance the security of the SSL/TLS connection between the cache servers and their web applications, and comply with the industry standards.
  impact: |
    Using an outdated version of TLS can reduce the security level of communications between clients and servers, potentially exposing data to interception or manipulation.
  remediation: |
    Upgrade the TLS version of your Azure Redis Cache servers to the latest version supported by Microsoft Azure to enhance security and compliance with industry standards.
  reference:
    - https://docs.microsoft.com/en-us/azure/redis-cache/
  tags: cloud,devops,azure,microsoft,redis,azure-cloud-config

flow: |
  code(1);
  for (let RedisData of iterate(template.redisIdList)) {
    set("name", RedisData);
    code(2);
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      az redis list --query '[*].{"id":id}'

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

  - engine:
      - sh
      - bash
    source: |
      az redis show --ids "$name" --query '{"MinimumTLSVersion":minimumTlsVersion}'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '1.0'
          - '1.1'
        negative: true

      - type: word
        part: body
        words:
          - '.'

    extractors:
      - type: dsl
        dsl:
          - 'name + " is using outdated TLS version"'
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