SAP Crystal Reports - Information Disclosure

# Exploit Title: [Sensitive Information Disclosure in SAP Crystal Reports]
# Date: [2019-04-10]
# Exploit Author: [Mohamed M.Fouad - From SecureMisr Company]
# Vendor Homepage: [https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=517899114]
# Version: [SAP Crystal Reports for Visual Studio, Version - 2010] (REQUIRED)
# Tested on: [Windows 10]
# CVE : [CVE-2019-0285]

POC:

1- Intercept the "Export" report http request

2- Copy the "__CRYSTALSTATE" + <crystal report user control> Viewer name parameter value. 

3- You will find a base64 value in "viewerstate" attribute. 

4- decode the value you will get database information such as: name, credentials, Internal Path disclosure and some debugging information.