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Investors Application - Client Side Cross Site Scripting Vulnerability

2016-02-19 15:15
Document Title:
Investors Application - Client Side Cross Site Scripting Vulnerability

References (Source):

Facebook Security ID: 246414938

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service Introduction:
Investor Relations Solutions - Designed for companies of all sizes and at every stage of the IPO process, our full
suite of solutions delivers
time saving tools and an integrated IR workflow. As an IR professional, you realize that staying ahead means you need
to simultaneously gather
intelligence on your current and potential shareholders, the dynamics of your sector and the markets at large while
optimizing your outreach
and communications strategy. Nasdaq Corporate Solutions offers the most comprehensive suite of content, analytics,
advisory services and
communications tools to help you maximize the value of your IR program. As a user of Nasdaq Corporate Solutions’ IR
Desktop you have access
to a targeting workflow designed to help you gather intelligence, understand the factors that drive your stock and
focus your efforts on the
investors that truly matter.

(Copy of the Homepage: http://business.nasdaq.com/intel/ir-management/index.html )

Abstract Advisory Information:
The Vulnerability Laboratory Research Team discovered a client-side cross site scripting web vulnerability in the
official Shareholder Investor Relations web-application. (2015-Q2)

Vulnerability Disclosure Timeline:
2016-02-12: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Affected Product(s):
Product: Investor Relations Solutions - Online Service (Web-Application) 2015 Q2

Exploitation Technique:

Severity Level:

Technical Details & Description:
A client-side cross site scripting web vulnerability has been discovered in the official Shareholder Investor Relations
web-application. (2015-Q2).
The vulnerability allows remote attackers to manipulate client-side application requests to compromise user account
session information.

The vulnerability is located in the browser name http request. Remote attackers are able to manipulate the local user
agent name value. After the first
manipulation the attacker requests the investor web-application with the wrong credentials to provoke a client-side
script code execution. The user agent
information are not correctly parsed or encoded which results in the client-side exploitation of the vulnerability.

The security risk of the cross site web vulnerability is estimated as medium with a cvss (common vulnerability scoring
system) count of 3.4.
Exploitation of the cross site scripting web vulnerability requires no privilege web application user account and no
user interaction.
Successful exploitation results in client-side account theft by hijacking, client-side phishing, client-side external
redirects and
non-persistent manipulation of affected or connected service modules.

Request Method(s):
[+] GET

Vulnerable Module(s):
[+] Results

Vulnerable File(s):
[+] results.cfm

Vulnerable Parameter(s):
[+] UserAgent (Client Name Value)

Vulnerable Service(s):
[+] https://investor.twitterinc.com/events.cfm
[+] investor.ebayinc.com/
[+] http://investor.apple.com/results.cfm
[+] https://investor.yahoo.net/releasedetail.cfm
[+] http://investors.redhat.com/
[+] http://www.intc.com/alerts.cfm
[+] http://investor.zynga.com/
[+] https://investor.verisign.com/
[+] http://investor.qualcomm.com/events.cfm
[+] http://investor.nvidia.com/results.cfm
[+] http://investor.avinc.com/
[+] http://investor.frontier.com/events.cfm
[+] http://investor.ea.com/events.cfm?list=Featured,Future,Past
[+] http://www.symrise.com/investors/
[+] http://investor.broadcom.com/directors.cfm
[+] http://investor.fortinet.com/events.cfm
[+] http://investor.kodak.com/events.cfm
[+] http://investor.netgear.com/releasedetail.cfm
[+] http://investor.compuware.com/releasedetail.cfm
[+] http://investor.broadcom.com/releases.cfm
[+] http://www.thyssenkrupp.com/en/investor/
[+] https://corporate.xing.com/english/investor-relations/
[+] https://investor.amgfunds.com/home
[+] http://investor.tiffany.com/annuals.cfm

Proof of Concept (PoC):
The vulnerability can be exploited by remote attackers withour privilege 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

Manual steps to reproduce the vulnerability ...
1. Open the link http://investor.fb.com/results.cfm?Quarter=2&Year=a
2. With tamper data in the request GET change the value of User-Agent to User-Agent[Mozilla/5.0 (X11; Linux i686;
rv:38.0) Gecko/20100101 Firefox/38.0<iframe src=x onload=alert('Xss_By_Samir')>
Note: To change the client details to a payload you can also use the firefox addon `user agent switcher`

PoC: XSS investor Facebook
Element RESULT.RECORDCOUNT is undefined in RESULTS. <br>The error occurred on line 49.
Date/Time: Tue Jun 30 01:42:44 EDT 2015<br>
Browser: Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Firefox/38.0<iframe src="x"
Remote Address:<br>
<!--- removed query string from error page - info sec viewed it as XSS - tws - 05/18/2010 --->

--- PoC Session Logs [GET] ---
GET http://investor.fb.com/results.cfm?Quarter=2&Year=a
Content Size[-1] Mime Type[text/html]
Request Headers:
User-Agent[Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Firefox/38.0<iframe src=x
Accept-Encoding[gzip, deflate]
Cookie[s_fid=03F48D6ED8CA933E-339AB2CC98F957CB; s_nr=1434283797152; s_vnum=1436875513272%26vn%3D5;

AMDA45NJ5DZ_BRIEFCASE=UPDATED%7C42169%2E3915972; _ga=GA1.2.1177113910.1434286822; s_cc=true; s_invisit=true;
gpv_p14=earnings%20-%20facebook; s_sq=%5B%5BB%5D%5D]
Response Headers:
Date[Tue, 30 Jun 2015 05:34:49 GMT]
Connection[keep-alive, Transfer-Encoding]


Solution - Fix & Patch:
The client-side cross site scripting web vulnerability can be patched by a secure parse and encode of the vulnerable
client agent name value.
Encode the input and parse the output to prevent further client-side script code injection attacks via GET method.

Security Risk:
The security risk of the remote cross site scripting web vulnerability in the investor web-application is estimated as
medium. (CVSS 3.4)

Credits & Authors:
Vulnerability Laboratory [Research Team] - Hadji Samir [s-dz () hotmail fr]

Disclaimer & Information:
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all
warranties, either expressed
or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or
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in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special
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or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or
limitation of liability for
consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody
to break any vendor licenses,
policies, deface websites, hack into databases or trade with fraud/stolen material.

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