id: CVE-2021-3654

info:
  name: noVNC Open Redirect
  author: geeknik
  severity: medium
  description: A user-controlled input redirects noVNC users to an external website.
  reference:
    - https://seclists.org/oss-sec/2021/q3/188
    - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3654
    - https://bugs.python.org/issue32084
    - https://opendev.org/openstack/nova/commit/04d48527b62a35d912f93bc75613a6cca606df66
  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-2021-3654
    cwe-id: CWE-601
  tags: redirect,novnc,cve,cve2021

requests:
  - method: GET

    path:
      - '{{BaseURL}}//example.com/%2f..'

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)example\.com.*$'
        part: header

      - type: status
        status:
          - 302
          - 301