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Message-ID: <56B1F434.7050603@vulnerability-lab.com>
Date: Wed, 3 Feb 2016 13:36:04 +0100
From: Vulnerability Lab <research@...nerability-lab.com>
To: fulldisclosure@...lists.org
Subject: [FD] SimpleView CRM - Client Side Open Redirect Vulnerability

Document Title:
===============
SimpleView CRM - Client Side Open Redirect Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1668


Release Date:
=============
2016-02-02


Vulnerability Laboratory ID (VL-ID):
====================================
1668


Common Vulnerability Scoring System:
====================================
2.8


Product & Service Introduction:
===============================
Customer Relationship Management only scratches the surface of our web-based destination management system. Combining meeting sales, 
industry partner management, consumer marketing, forecasting, business analysis, reporting, and more, Simpleview CRM is the most 
widely used tool in destination marketing.

(Copy of the Vendor Homepage: http://www.simpleviewinc.com/your-solutions/crm/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a client-side redirect web vulnerability in the official SimpleView CRM web-application.


Vulnerability Disclosure Timeline:
==================================
2016-01-17: Researcher Notification & Coordination (Tommy DeVoss)
2016-01-18: Vendor Notification (SimpleView CRM Security Team)
2016-02-02: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
SimpleView
Product: CRM - Application 2016 Q1


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Low


Technical Details & Description:
================================
An open redirect web vulnerability has been discovered in the official SimpleView CRM web-application.
The bug allows remote attackers to execute external urls by the internal web-application requests via client-side.

The vulnerability is located in the `redirect` parameter of the vulnerable `./crm/track/` module. The vulnerability allows an remote 
attacker to prepare client-side malicious urls to external sources. The request method to execute is GET and the vulnerability is 
located on the application-side of the online-service. The vulnerability is a classic open redirect web vulnerability.

The security risk of the open redirect web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.0. 
Exploitation of the persistent input validation web vulnerability requires no privileged user account and low or medium user interaction. 
Successful exploitation of the vulnerability results in client-side redirects to malicious sources or client-side phishing.

Request Method(s):
				[+] GET

Vulnerable Module(s):
				[+] ./crm/track/

Vulnerable Parameter(s):
				[+] redirect


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by remote attackers without privileged web-application user account and with low or medium user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Vulnerability:
Open redirect in the following module:	/plugins/crm/track/?key=4_314&redirect=http://EVILURLHERE.com

PoC:
www.example.com/plugins/crm/track/?key=4_314&redirect=http://test.de/


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure restriction of the `redirect/key` parameter in the `plugins` module of the software.
Disallow to request not whitelisted webpages in  the `redirect` value and include a tag filter to prevent as well.


Security Risk:
==============
The security risk of the client-side open redirect web vulnerability in the simpleview crm web-application is estimated as low. (CVSS 2.8)


Credits & Authors:
==================
Tommy DeVoss


Disclaimer & Information:
=========================
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