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elFinder 2.1.58 - Remote Code Execution

ID: CVE-2021-32682

Severity: critical

Author: smaranchand

Tags: cve2021,cve,elfinder,misconfig,rce,oss,std42

Description

Section titled “Description”

elFinder 2.1.58 is impacted by multiple remote code execution vulnerabilities that could allow an attacker to execute arbitrary code and commands on the server hosting the elFinder PHP connector, even with minimal configuration.

YAML Source

Section titled “YAML Source”
id: CVE-2021-32682


info:
  name: elFinder 2.1.58 - Remote Code Execution
  author: smaranchand
  severity: critical
  description: elFinder 2.1.58 is impacted by multiple remote code execution vulnerabilities that could allow an attacker to execute arbitrary code and commands on the server hosting the elFinder PHP connector, even with minimal configuration.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
  remediation: Update to elFinder 2.1.59 or later. As a workaround, ensure the connector is not exposed without authentication.
  reference:
    - https://smaranchand.com.np/2022/01/organization-vendor-application-security/
    - https://blog.sonarsource.com/elfinder-case-study-of-web-file-manager-vulnerabilities
    - https://github.com/Studio-42/elFinder/security/advisories/GHSA-wph3-44rj-92pr
    - https://nvd.nist.gov/vuln/detail/CVE-2021-32682
    - https://github.com/Studio-42/elFinder/commit/a106c350b7dfe666a81d6b576816db9fe0899b17
  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-2021-32682
    cwe-id: CWE-22
    epss-score: 0.97312
    epss-percentile: 0.99872
    cpe: cpe:2.3:a:std42:elfinder:*:*:*:*:*:*:*:*
  metadata:
    max-request: 9
    vendor: std42
    product: elfinder
    github: https://github.com/Studio-42/elFinder
  tags: cve2021,cve,elfinder,misconfig,rce,oss,std42


http:
  - method: GET
    path:
      - "{{BaseURL}}/admin/elfinder/elfinder-cke.html"
      - "{{BaseURL}}/assets/backend/elfinder/elfinder-cke.html"
      - "{{BaseURL}}/assets/elFinder-2.1.9/elfinder.html"
      - "{{BaseURL}}/assets/elFinder/elfinder.html"
      - "{{BaseURL}}/backend/elfinder/elfinder-cke.html"
      - "{{BaseURL}}/elfinder/elfinder-cke.html"
      - "{{BaseURL}}/uploads/assets/backend/elfinder/elfinder-cke.html"
      - "{{BaseURL}}/uploads/assets/backend/elfinder/elfinder.html"
      - "{{BaseURL}}/uploads/elfinder/elfinder-cke.html"


    stop-at-first-match: true


    matchers-condition: and
    matchers:
      - type: word
        words:
          - "elfinder"
          - "php/connector"
        condition: and


      - type: status
        status:
          - 200
# digest: 4a0a00473045022100bb6294ba56f8424b841e4501a6e4b3b6691a98c68ad11c53b2380f30aa16b5bf0220217eef4515355ebddfeaeea65181e2168bb20b1f2ae91d3a5c3288587299cbb3:922c64590222798bb761d5b6d8e72950

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-2021-32682.yaml"

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