Azure Service Bus Public Network Access Disabled

ID: azure-servicebus-public-access-disabled

Severity: high

Author: princechaddha

Tags: cloud,devops,azure,microsoft,service-bus,azure-cloud-config

Description

Ensure that public network access (i.e., all network access) to Microsoft Azure Service Bus namespaces is disabled in order to enhance security by preventing unauthorized access.

YAML Source

id: azure-servicebus-public-access-disabled
info:
  name: Azure Service Bus Public Network Access Disabled
  author: princechaddha
  severity: high
  description: |
    Ensure that public network access (i.e., all network access) to Microsoft Azure Service Bus namespaces is disabled in order to enhance security by preventing unauthorized access.
  impact: |
    Enabling public network access to Service Bus namespaces can allow unauthorized access, potentially leading to data leakage or unauthorized operations.
  remediation: |
    Disable public network access to all your Azure Service Bus namespaces to ensure that they are only accessible through authorized private networks.
  reference:
    - https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-networking
  tags: cloud,devops,azure,microsoft,service-bus,azure-cloud-config

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

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

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

  - engine:
      - sh
      - bash
    source: |
      az servicebus namespace network-rule-set show --namespace-name "$name" --resource-group "$resourceGroup" --query '{publicNetworkAccess:publicNetworkAccess,ipRules:ipRules}'

    matchers:
      - type: word
        words:
          - '"ipRules": []'
          - '"publicNetworkAccess": "Enabled"'
        condition: and

    extractors:
      - type: dsl
        dsl:
          - 'name + " in " + resourceGroup + " has public network access enabled with no IP rules set"'
# digest: 4a0a0047304502210090215128fbd39cf5d9964572e55fe8c85fd3ea7594bf654c6328ae8cd5ac0a7702204509b7acd9b5d7e1b37f1ad656e13f2127e78624fd3cdefb5c917cce1ba245bc: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/azure/servicebus/azure-servicebus-public-access-disabled.yaml"

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