Document Title:
===============
Oracle Flex Cube Direct BA v10.5 - Cross Site Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2101


Release Date:
=============
2017-10-31


Vulnerability Laboratory ID (VL-ID):
====================================
2101


Common Vulnerability Scoring System:
====================================
4


Vulnerability Class:
====================
Cross Site Scripting - Persistent


Current Estimated Price:
========================
500€ - 1.000€


Product & Service Introduction:
===============================
Oracle FLEX CUBE addresses the current and future business requirements of banks. The product offers a personalized and intuitive web 
experience with an integrated portfolio summary, relationship based offers, alerts, reminders and self-service tools that enhance the 
overall banking experience. Online support through call or chat offers instant assistance to the customer for active query resolution. 
The product also enables banks to come up with better insights for up selling and cross selling. Oracle FLEXCUBE helps banks build 
relationships, which culminate in customer acquisition and retention.

(Copy of the Homepage: http://www.oracle.com/us/industries/financial-services/mc-direct-banking-internet-ds-1590673.pdf )
(Copy of the Homepage: http://www.oracle.com/us/products/applications/financial-services/flexcube/index.html )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a reflected cross site scripting vulnerability in the Oracle Flex Cube Direct Banking Application v10.5.


Vulnerability Disclosure Timeline:
==================================
2017-10-24: Security Acknowledgements  (Security Department)
2017-10-31: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Oracle
Product: Oracle Flex Cube Direct Banking Application - (Web-Application) 10.5


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


Severity Level:
===============
Medium


Technical Details & Description:
================================
A non-persistent cross site scripting vulnerability has been discovered in the official Oracle Flex Cube Direct Banking Application v10.5.
The vulnerability allows to inject own malicious code to client-side POST or GET method request to hijack customer session credentials or 
to manipulate client-side requested web context.

The vulnerability exists because of the method is uses a unsanitized function with a value that can be manipulated by an user account through 
the basic application user interface. The issue can be exploited to inject arbitrary objects into the application functions or modules and could 
allow authenticated attackers to execute arbitrary code via specially crafted serialized objects. 

Exploitation of the cross site scripting vulnerability requires a low privileged web-application user account and only low user interaction. 
Successful exploitation of the vulnerability results in non-persistent phishing attacks, session hijacking,  non-persistentexternal redirect 
to malicious sources and non-persistent manipulation of affected or connected web module context. Successful exploitation of this vulnerability 
requires a privileged user account login.

Vulnerable Function(s):
[+] document.frmmain.fldbranchlocation.value

Vulnerable Module(s):
[+] atm_locator


Proof of Concept (PoC):
=======================
The cross site scripting vulnerability can be exploited by remote attacker 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.


</script><!--[if lte IE 7]><link rel="stylesheet" href="css/L_COLPAL1/eng_01.css" type="text/css" /><![endif]--><!--[if (!IE) | (gte IE 8)]--><link 449) 
rel="stylesheet" href="css/L_COLPAL1/eng_01.uri.css" type="text/css"><!--[endif]--><meta name="viewport" 
content="width=device-width; initial-scale=1; minimal-450) ui"><script type="text/JavaScript" language="JavaScript">
function initialize (){

if(document.frmmain.fldbranchlocation.value==''){
document.frmmain.fldbranchlocation.value='PAYLOAD HERE';
}

}
function fnSearch () {
/*
if(document.frmmain.fldbranchlocation.value==''){
alert("Invalid location");
return;
}*/
document.frmmain.fldRequestId.value = "RRLOB02";
document.frmmain.fldLangId.value = 'eng';
document.frmmain.fldDeviceId.value = '01' ;
document.frmmain.submit();
return;
}

Note: he payload will bypass the most of the WAFs running behind the application. Successfully tested on Incapsula WAF.
The vulnerable code can be triggered through the'document.frmmain.fldbranchlocation.value='PAYLOAD HERE';' method defined for atm_locator module.

Reference(s):
https://drive.google.com/drive/folders/0B2p8gG1WpnRnaVA2N2FHNDZkeXM?usp=sharing


Solution - Fix & Patch:
=======================
The solution to resolve the vulnerability would be to update to the newst oracle application version 12.5.


Security Risk:
==============
The security risk of the reflected cross site scripting vulnerability in the oracle banking application is estimated as medium.


Credits & Authors:
==================
Ajay Gowtham [gowtham.ajay5@gmail.com] - https://www.vulnerability-lab.com/show.php?user=Ajay+Gowtham


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=========================
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