RENPHO 3.0.0 Information Disclosure

`Hello together,   
  
we’ve found the following vulnerability below.   
  
Affected software: RENPHO V3.0.0 (iOS App)  
Vulnerability type: Missing Encryption and Integrity Check of Sensitive Data  
Vulnerable version: Renpho Mobile Application V3.0.0 for iOS  
Vulnerable component: Client app, transmitting data to server backend  
Vendor report confidence: Unconfirmed  
Fixed version: -  
Vendor notification: 13/08/19  
Solution date:  
CVE reference: CVE-2019-14808  
CVSSv3 Score: 6.8 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N  
Researcher Credits: Tim Schughart, Christian Horn  
Communication Timeline:   
13th August 2019 Initial contact - no response  
26th September second contact attempt - no response   
08th October fulldisclosure   
  
Vulnerability Details:  
The client application (mobile app for iOS) transmits data unencrypted  
to an server in JSON without integrity check, if an user changes  
personal data in his profile tab oder logs hisself in his account.  
  
Proof of concept:  
Caputre traffice via proxy or MITM attack, while user logs in or changes his user profile. You are able to catch session id for cloning, password in cleartext oder change data on the fly, because of an missing integrity check.   
  
  
Best regards / Mit freundlichen Grüßen   
  
Dr. h.c. Tim Schughart   
CEO / Geschäftsführer   
  
--  
ProSec GmbH  
Robert-Koch-Straße 1-9  
56751 Polch   
  
Website: https://www.prosec-networks.com   
E-Mail: [email protected]   
Phone: +49 (0)261 450 930 90  
  
Sitz der Gesellschaft / Company domiciled in: Polch  
Registergericht / registry Court: Amtsgericht Koblenz, HRB 26457  
Geschäftsführer: Tim Schughart  
UST-IdNr./ VAT ID: DE321817516  
  
  
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`