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Subject: [FD] Oracle Discoverer Viewer BI - Open Redirect Vulnerability
From: Vulnerability Lab <research () vulnerability-lab ! com>
Date: 2016-04-27 12:15:24
Message-ID: 5720AD5C.40204 () vulnerability-lab ! com
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Document Title:
===============
Oracle Discoverer Viewer BI - Open Redirect Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1667
Oracle ID: S0666670
Release Date:
=============
2016-04-26
Vulnerability Laboratory ID (VL-ID):
====================================
1667
Common Vulnerability Scoring System:
====================================
2.8
Product & Service Introduction:
===============================
Discoverer is an intuitive ad-hoc query, reporting, analysis, and Web-publishing tool that \
empowers business users at all levels of the organization to gain immediate access to \
information from data marts, data warehouses, online transaction processing systems and Oracle \
E-Business Suite.. The latest release of Oracle Business Intelligence Discoverer 11g offers \
new functionality, including published Discoverer Webservice APIs, integration with Oracle \
WebCenter, integration with Oracle WebLogic Server, integration with Enterprise Manager \
(Fusion Middleware Control) and improved performance and scalability.
(Copy of the Vendor Homepage: \
http://www.oracle.com/technetwork/developer-tools/discoverer/overview/index.html )
Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered an open redirect web \
vulnerability in the official Oracle Discoverer Viewer Business Intelligence software.
Vulnerability Disclosure Timeline:
==================================
2016-01-18: Researcher Notification & Coordination (Tommy DeVoss)
2016-01-19: Vendor Notification (Oracle Corporation Security Team)
2016-01-20: Vendor Response/Feedback (Oracle Corporation Security Team)
2016-04-25: Vendor Fix/Patch (Oracle BI Developer Team)
2016-04-26: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Oracle
Product: Oracle Discoverer Viewer Business Intelligence - Software 2016 Q1
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Low
Technical Details & Description:
================================
An open redirect web vulnerability has been discovered in the official Oracle Discoverer Viewer \
for Business Intelligence software. The bug allows remote attackers to execute external urls by \
the internal web-application requests via client-side.
The vulnerability is located in the `customUrl` parameter of the vulnerable `exit` 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 software. 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):
[+] exit
Vulnerable Parameter(s):
[+] customUrl
Proof of Concept (PoC):
=======================
The open redirect web vulnerability can be exploited by remote attackers without privileged \
web-application user account and with medium user interaction. For security demonstration or to \
reproduce the vulnerability follow the provided information and steps below to continue.
PoC:
127.0.0.1:8080/path/to/app/exit?event=exit&clientType=viewer&customUrl=http://[EVIL-URL-INPUT!].com
Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure restriction of the `customUrl` parameter in the \
`exit` module of the software. Disallow to request not whitelisted webpages in the `customURL` \
value and include a tag filter to prevent as well.
Security Risk:
==============
The security risk of the open redirect web vulnerability in the Oracle Discoverer Viewer \
Business Intelligence software is estimated as low. (CVSS 2.8)
Credits & Authors:
==================
Tommy DeVoss - [http://www.vulnerability-lab.com/show.php?user=Tommy%20DeVoss]
Disclaimer & Information:
=========================
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