Azure VM Microsoft Entra ID Authentication Not Enabled

ID: azure-vm-entra-id-unenabled

Severity: medium

Author: princechaddha

Tags: cloud,devops,azure,microsoft,entra-id,azure-cloud-config

Description

Ensure that your Microsoft Azure virtual machines (VMs) are configured to use Microsoft Entra ID credentials for secure SSH/RDP access. Once enabled, you can use your corporate Microsoft Entra ID credentials to log in to your virtual machines, enforce Multi-Factor Authentication (MFA), or enable access via RBAC roles.

YAML Source

id: azure-vm-entra-id-unenabled
info:
  name: Azure VM Microsoft Entra ID Authentication Not Enabled
  author: princechaddha
  severity: medium
  description: |
    Ensure that your Microsoft Azure virtual machines (VMs) are configured to use Microsoft Entra ID credentials for secure SSH/RDP access. Once enabled, you can use your corporate Microsoft Entra ID credentials to log in to your virtual machines, enforce Multi-Factor Authentication (MFA), or enable access via RBAC roles.
  impact: |
    Not configuring VMs with Microsoft Entra ID authentication could expose them to unauthorized access and security breaches.
  remediation: |
    Ensure the Microsoft Entra ID authentication extensions, "AADLoginForWindows" or "AADLoginForLinux", are installed and enabled on your Azure VMs for secure access management.
  reference:
    - https://docs.microsoft.com/en-us/azure/active-directory/develop/
  tags: cloud,devops,azure,microsoft,entra-id,azure-cloud-config

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

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

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

  - engine:
      - sh
      - bash
    source: |
      az vm extension list --vm-name "$name" --resource-group "$resourceGroup" --query '[*].name'

    matchers-condition: and
    matchers:
      - type: word
        words:
          - 'AADLoginForWindows'
          - 'AADLoginForLinux'

    extractors:
      - type: dsl
        dsl:
          - 'name + " in " + resourceGroup + " does not have Microsoft Entra ID authentication enabled"'
# digest: 4b0a00483046022100e9377e4b50b0268d777d0f9f30a71dc2467b19530d1bcd818979243b111104fc022100fb443e02de8089109c30278e5c1684866aee8d9307f4d91e694864069c38e9e0:922c64590222798bb761d5b6d8e72950

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/virtualmachines/azure-vm-entra-id-unenabled.yaml"

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