azure-postgres-log-connections-disabled: Azure PostgreSQL Log Connections Not Enabled

id: azure-postgres-log-connections-disabled
info:
  name: Azure PostgreSQL Log Connections Not Enabled
  author: princechaddha
  severity: medium
  description: |
    Ensure that "log_connections" server parameter is enabled for all PostgreSQL database servers available in your Microsoft Azure cloud account. The "log_connections" parameter allows each attempted connection to the database server to be logged, including successful client authentication requests. Only Azure users with administrative privileges can change this parameter at session start, and it cannot be changed during an access session.
  impact: |
    Disabling "log_connections" prevents logging of connection attempts to the PostgreSQL servers, which can hinder security monitoring and compliance.
  remediation: |
    Enable the "log_connections" server parameter for all Azure PostgreSQL servers to ensure that all connection attempts are logged, enhancing security monitoring capabilities.
  reference:
    - https://docs.microsoft.com/en-us/azure/postgresql/concepts-server-logs
  tags: cloud,devops,azure,microsoft,postgresql,azure-cloud-config

flow: |
  code(1);
  for (let ServerData of iterate(template.serverList)) {
    ServerData = JSON.parse(ServerData);
    set("name", ServerData.name);
    set("resourceGroup", ServerData.resourceGroup);
    code(2);
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      az postgres server list --output json --query '[*].{"name":name,"resourceGroup":resourceGroup}'

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

  - engine:
      - sh
      - bash
    source: |
      az postgres server configuration show --server-name "$name" --resource-group "$resourceGroup" --name log_connections --query 'value'

    matchers:
      - type: word
        words:
          - 'off'

    extractors:
      - type: dsl
        dsl:
          - 'name + " in " + resourceGroup + " does not have log_connections enabled"'
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