# Envoy Proxy Admin Interface Exposure Detection Module

id: envoy-admin-exposure
info:
  name: Envoy Admin Interface Exposure
  author: sif
  severity: high
  description: Detects an exposed Envoy admin interface that leaks build and config details and exposes runtime shutdown and modification
  tags: [envoy, proxy, service-mesh, admin, controlplane, exposure, unauth, recon]

type: http

http:
  method: GET
  paths:
    - "{{BaseURL}}/server_info"

  matchers:
    - type: word
      part: body
      words:
        - "\"hot_restart_version\""
        - "\"command_line_options\""
      condition: and

    - type: regex
      part: body
      regex:
        - '"state"\s*:\s*"(LIVE|PRE_INITIALIZING|INITIALIZING|DRAINING)"'

    - type: status
      status:
        - 200

  extractors:
    - type: regex
      name: envoy_version
      part: body
      regex:
        - '"version"\s*:\s*"([^"]+)"'
      group: 1