Changjetong T+ <= 16.x GetStoreWarehouseByStore Deserialization RCE

Vulnerability Description

Changjetong T+ versions up to and including 16.x contain a .NET deserialization vulnerability in an AjaxPro endpoint that can lead to remote code execution. A remote attacker can send a crafted request to /tplus/ajaxpro/Ufida.T.CodeBehind._PriorityLevel,App_Code.ashx?method=GetStoreWarehouseByStore with a malicious JSON body that leverages deserialization of attacker-controlled .NET types to invoke arbitrary methods such as System.Diagnostics.Process.Start. This can result in execution of arbitrary commands in the context of the T+ application service account. Exploitation evidence was observed by the Shadowserver Foundation as early as 2023-08-19 (UTC).

References

• https://www.chanjetvip.com/product/goods/detail?id=6077e91b70fa071069139f62
• https://www.freebuf.com/articles/web/381731.html
• https://blog.csdn.net/qq_53003652/article/details/134031230
• https://blog.csdn.net/u010025272/article/details/131553591
• https://github.com/MD-SEC/MDPOCS/blob/main/ChangJieTongTPlus_GetStoreWarehouseByStore_Rce_Poc.py
• https://www.vulncheck.com/advisories/changjetong-tplus-getstorewarehousebystore-deserialization-rce