XSS, SQL Injection, CWE-79, CWE-89, CAPEC-86, CAPEC-66, www.groupon.com

The _thepoint cookie appears to be vulnerable to SQL injection attacks. A single quote was submitted in the _thepoint cookie, and a general error message was returned. Two single quotes were then submitted and the error message disappeared. You should review the contents of the error message, and the application's handling of other input, to confirm whether a vulnerability is present.

The application attempts to block SQL injection attacks but this can be circumvented by submitting a URL-encoded NULL byte (%00) before the characters that are being blocked.

Remediation detail

NULL byte bypasses typically arise when the application is being defended by a web application firewall (WAF) that is written in native code, where strings are terminated by a NULL byte. You should fix the actual vulnerability within the application code, and if appropriate ask your WAF vendor to provide a fix for the NULL byte bypass.

Issue background

SQL injection vulnerabilities arise when user-controllable data is incorporated into database SQL queries in an unsafe manner. An attacker can supply crafted input to break out of the data context in which their input appears and interfere with the structure of the surrounding query.

Various attacks can be delivered via SQL injection, including reading or modifying critical application data, interfering with application logic, escalating privileges within the database and executing operating system commands.

Remediation background

The most effective way to prevent SQL injection attacks is to use parameterised queries (also known as prepared statements) for all database access. This method uses two steps to incorporate potentially tainted data into SQL queries: first, the application specifies the structure of the query, leaving placeholders for each item of user input; second, the application specifies the contents of each placeholder. Because the structure of the query has already defined in the first step, it is not possible for malformed data in the second step to interfere with the query structure. You should review the documentation for your database and application platform to determine the appropriate APIs which you can use to perform parameterised queries. It is strongly recommended that you parameterise every variable data item that is incorporated into database queries, even if it is not obviously tainted, to prevent oversights occurring and avoid vulnerabilities being introduced by changes elsewhere within the code base of the application.

You should be aware that some commonly employed and recommended mitigations for SQL injection vulnerabilities are not always effective:

One common defense is to double up any single quotation marks appearing within user input before incorporating that input into a SQL query. This defense is designed to prevent malformed data from terminating the string in which it is inserted. However, if the data being incorporated into queries is numeric, then the defense may fail, because numeric data may not be encapsulated within quotes, in which case only a space is required to break out of the data context and interfere with the query. Further, in second-order SQL injection attacks, data that has been safely escaped when initially inserted into the database is subsequently read from the database and then passed back to it again. Quotation marks that have been doubled up initially will return to their original form when the data is reused, allowing the defense to be bypassed.
Another often cited defense is to use stored procedures for database access. While stored procedures can provide security benefits, they are not guaranteed to prevent SQL injection attacks. The same kinds of vulnerabilities that arise within standard dynamic SQL queries can arise if any SQL is dynamically constructed within stored procedures. Further, even if the procedure is sound, SQL injection can arise if the procedure is invoked in an unsafe manner using user-controllable data.

Request 1

GET /user_demographics/demographic_form_banner.html?&_=1299007542683 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/
x-requested-with: XMLHttpRequest
content-type: application/x-www-form-urlencoded
accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; email=test%40fastdial.net; adchemy_id=; division=san-jose; _thepoint=c34d720c801b2b00e49f006c1240e874%00'; __utma=44473723.1103413385.1297805149.1298999612.1299007543.3; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.1.10.1299007543

Response 1

HTTP/1.1 500 Internal Server Error
Server: nginx/0.7.65
Content-Type: text/html
Content-Length: 30917
Age: 4
Date: Tue, 01 Mar 2011 19:26:30 GMT
Expires: Tue, 01 Mar 2011 19:26:36 GMT
Connection: keep-alive

<!DOCTYPE html>

<!--[if IE 7 ]> <html class="ie7" lang
...[SNIP]...

Request 2

GET /user_demographics/demographic_form_banner.html?&_=1299007542683 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/
x-requested-with: XMLHttpRequest
content-type: application/x-www-form-urlencoded
accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; email=test%40fastdial.net; adchemy_id=; division=san-jose; _thepoint=c34d720c801b2b00e49f006c1240e874%00''; __utma=44473723.1103413385.1297805149.1298999612.1299007543.3; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.1.10.1299007543

Response 2

HTTP/1.1 204 No Content
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 19:26:30 GMT
Content-Type: text/html
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 19:26:30 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Status: 204
X-Runtime: 22
Cache-Control: no-cache
Content-Length: 0
Connection: keep-alive

2. Cross-site scripting (reflected) previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/demographic_form_banner.html

Issue detail

The value of the subscriber_email cookie is copied into the HTML document as plain text between tags. The payload 16b2a<script>alert(1)</script>4eec7245226 was submitted in the subscriber_email cookie. This input was echoed unmodified in the application's response.

This proof-of-concept attack demonstrates that it is possible to inject arbitrary JavaScript into the application's response.

Because the user data that is copied into the response is submitted within a cookie, the application's behaviour is not trivial to exploit in an attack against another user. Typically, you will need to find a means of setting an arbitrary cookie value in the victim's browser in order to exploit the vulnerability. This limitation considerably mitigates the impact of the vulnerability.

Issue background

Reflected cross-site scripting vulnerabilities arise when data is copied from a request and echoed into the application's immediate response in an unsafe way. An attacker can use the vulnerability to construct a request which, if issued by another application user, will cause JavaScript code supplied by the attacker to execute within the user's browser in the context of that user's session with the application.

The attacker-supplied code can perform a wide variety of actions, such as stealing the victim's session token or login credentials, performing arbitrary actions on the victim's behalf, and logging their keystrokes.

Users can be induced to issue the attacker's crafted request in various ways. For example, the attacker can send a victim a link containing a malicious URL in an email or instant message. They can submit the link to popular web sites that allow content authoring, for example in blog comments. And they can create an innocuous looking web site which causes anyone viewing it to make arbitrary cross-domain requests to the vulnerable application (using either the GET or the POST method).

The security impact of cross-site scripting vulnerabilities is dependent upon the nature of the vulnerable application, the kinds of data and functionality which it contains, and the other applications which belong to the same domain and organisation. If the application is used only to display non-sensitive public content, with no authentication or access control functionality, then a cross-site scripting flaw may be considered low risk. However, if the same application resides on a domain which can access cookies for other more security-critical applications, then the vulnerability could be used to attack those other applications, and so may be considered high risk. Similarly, if the organisation which owns the application is a likely target for phishing attacks, then the vulnerability could be leveraged to lend credibility to such attacks, by injecting Trojan functionality into the vulnerable application, and exploiting users' trust in the organisation in order to capture credentials for other applications which it owns. In many kinds of application, such as those providing online banking functionality, cross-site scripting should always be considered high risk.

Issue remediation

In most situations where user-controllable data is copied into application responses, cross-site scripting attacks can be prevented using two layers of defenses:

Input should be validated as strictly as possible on arrival, given the kind of content which it is expected to contain. For example, personal names should consist of alphabetical and a small range of typographical characters, and be relatively short; a year of birth should consist of exactly four numerals; email addresses should match a well-defined regular expression. Input which fails the validation should be rejected, not sanitised.
User input should be HTML-encoded at any point where it is copied into application responses. All HTML metacharacters, including < > " ' and =, should be replaced with the corresponding HTML entities (< > etc).

In cases where the application's functionality allows users to author content using a restricted subset of HTML tags and attributes (for example, blog comments which allow limited formatting and linking), it is necessary to parse the supplied HTML to validate that it does not use any dangerous syntax; this is a non-trivial task.

Request

GET /user_demographics/demographic_form_banner.html?addx=test@fastdial.net&_=1298999611622 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1?utm_medium=email&utm_source=newsletter&c=title&addx=test@fastdial.net&utm_content=san-jose_feed&user=test@fastdial.net&d=deal&divison=san-jose&s=more_deals_for_you&p=0&date=20110301
x-requested-with: XMLHttpRequest
content-type: application/x-www-form-urlencoded
accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net16b2a<script>alert(1)</script>4eec7245226; _tpaid=newsletter; adchemy_id=; _tpmed=email; division=san-jose; s=29108ae4-4427-11e0-ae71-005056952866; email=test%40fastdial.net; _thepoint=c34d720c801b2b00e49f006c1240e874; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.1.10.1298999612

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:29:41 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: subscriber_email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:29:41 GMT
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:29:41 GMT
Set-Cookie: email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:29:41 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:29:41 GMT; HttpOnly
Status: 200
ETag: "8ef21b84a48ea392c576af786a46e9f2"
X-Runtime: 44
Cache-Control: private, max-age=0, must-revalidate
Connection: close

<div class='clearfix' id='above_main'>
<div class='demographic_banner clearfix' id='demographic_collection_form'>
<form action="/user_demographics/update_with_optional_subscription" class="new_u
...[SNIP]...
<div title='test@fastdial.net16b2a<script>alert(1)</script>4eec7245226'>
test@fastdial.net16b2a<script>alert(1)</script>4eec7245226
</div>
...[SNIP]...

3. Cookie scoped to parent domain previous next
There are 7 instances of this issue:

/
/contact-us
/san-jose/
/san-jose/deals/pure-barre-los-gatos-1
/user_demographics/demographic_form_banner.html
/user_demographics/dismiss
/user_demographics/update_with_optional_subscription

Issue background

A cookie's domain attribute determines which domains can access the cookie. Browsers will automatically submit the cookie in requests to in-scope domains, and those domains will also be able to access the cookie via JavaScript. If a cookie is scoped to a parent domain, then that cookie will be accessible by the parent domain and also by any other subdomains of the parent domain. If the cookie contains sensitive data (such as a session token) then this data may be accessible by less trusted or less secure applications residing at those domains, leading to a security compromise.

Issue remediation

By default, cookies are scoped to the issuing domain and all subdomains. If you remove the explicit domain attribute from your Set-cookie directive, then the cookie will have this default scope, which is safe and appropriate in most situations. If you particularly need a cookie to be accessible by a parent domain, then you should thoroughly review the security of the applications residing on that domain and its subdomains, and confirm that you are willing to trust the people and systems which support those applications.

3.1. http://www.groupon.com/ next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/

Issue detail

The following cookie was issued by the application and is scoped to a parent of the issuing domain:

_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:40:27 GMT; HttpOnly

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

GET / HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.9.2.1298999613665; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; adchemy_id=; division=san-jose; email=test%40fastdial.net; _thepoint=c34d720c801b2b00e49f006c1240e874

Response

HTTP/1.1 302 Moved Temporarily
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:40:27 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:40:27 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:40:27 GMT; HttpOnly
Status: 302
Location: http://www.groupon.com/san-jose/
X-Runtime: 14
Cache-Control: no-cache
Content-Length: 98
Connection: keep-alive

<html><body>You are being <a href="http://www.groupon.com/san-jose/">redirected</a>.</body></html>

3.2. http://www.groupon.com/contact-us previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/contact-us

Issue detail

The following cookie was issued by the application and is scoped to a parent of the issuing domain:

_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:40:42 GMT; HttpOnly

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

GET /contact-us HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; subscriber_email=test%40fastdial.net; email=test%40fastdial.net; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.18.2.1299001244132; adchemy_id=; division=san-jose; _thepoint=c34d720c801b2b00e49f006c1240e874; _chartbeat2=sq6k5rzuuoqiwvy6

Response

3.3. http://www.groupon.com/san-jose/ previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/

Issue detail

The following cookie was issued by the application and is scoped to a parent of the issuing domain:

_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:40:28 GMT; HttpOnly

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

GET /san-jose/ HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.9.2.1298999613665; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; email=test%40fastdial.net; adchemy_id=; division=san-jose; _thepoint=c34d720c801b2b00e49f006c1240e874

Response

3.4. http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1 previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/deals/pure-barre-los-gatos-1

Issue detail

The following cookies were issued by the application and is scoped to a parent of the issuing domain:

_tpaid=newsletter; domain=.groupon.com; path=/; expires=Tue, 08-Mar-2011 17:13:00 GMT
_tpmed=email; domain=.groupon.com; path=/; expires=Tue, 08-Mar-2011 17:13:00 GMT
_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:13:00 GMT; HttpOnly

The cookies do not appear to contain session tokens, which may reduce the risk associated with this issue. You should review the contents of the cookies to determine their function.

Request

GET /san-jose/deals/pure-barre-los-gatos-1?utm_medium=email&utm_source=newsletter&c=title&addx=test@fastdial.net&utm_content=san-jose_feed&user=test@fastdial.net&d=deal&divison=san-jose&s=more_deals_for_you&p=0&date=20110301 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; subscriber_email=test%40fastdial.net; division=san-jose; email=test%40fastdial.net; visited=true; __utmz=44473723.1297805174.1.4.utmcsr=newsletter|utmccn=laser-and-cosmetic-center|utmcmd=email; __utma=44473723.1103413385.1297805149.1297805149.1297805149.1; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; _chartbeat2=sq6k5rzuuoqiwvy6

Response

3.5. http://www.groupon.com/user_demographics/demographic_form_banner.html previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/demographic_form_banner.html

Issue detail

The following cookie was issued by the application and is scoped to a parent of the issuing domain:

_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:13:24 GMT; HttpOnly

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

GET /user_demographics/demographic_form_banner.html?addx=test@fastdial.net&_=1298999611622 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1?utm_medium=email&utm_source=newsletter&c=title&addx=test@fastdial.net&utm_content=san-jose_feed&user=test@fastdial.net&d=deal&divison=san-jose&s=more_deals_for_you&p=0&date=20110301
x-requested-with: XMLHttpRequest
content-type: application/x-www-form-urlencoded
accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; _tpaid=newsletter; adchemy_id=; _tpmed=email; division=san-jose; s=29108ae4-4427-11e0-ae71-005056952866; email=test%40fastdial.net; _thepoint=c34d720c801b2b00e49f006c1240e874; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.1.10.1298999612

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:13:24 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: subscriber_email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:24 GMT
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:13:24 GMT
Set-Cookie: email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:24 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:13:24 GMT; HttpOnly
Status: 200
ETag: "7a503aa81cd310231b4f95be703b97d3"
X-Runtime: 38
Cache-Control: private, max-age=0, must-revalidate
Connection: close

<div class='clearfix' id='above_main'>
<div class='demographic_banner clearfix' id='demographic_collection_form'>
<form action="/user_demographics/update_with_optional_subscription" class="new_u
...[SNIP]...

3.6. http://www.groupon.com/user_demographics/dismiss previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/dismiss

Issue detail

The following cookie was issued by the application and is scoped to a parent of the issuing domain:

_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:48:47 GMT; HttpOnly

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

GET /user_demographics/dismiss?id=31260610 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; subscriber_email=test%40fastdial.net; email=test%40fastdial.net; adchemy_id=; division=san-jose; _thepoint=c34d720c801b2b00e49f006c1240e874; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.19.2.1299001244132; _chartbeat2=sq6k5rzuuoqiwvy6

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:48:47 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:48:47 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:48:47 GMT; HttpOnly
Status: 200
X-Runtime: 40
Cache-Control: private, max-age=0, must-revalidate
Content-Length: 1
Connection: keep-alive

3.7. http://www.groupon.com/user_demographics/update_with_optional_subscription previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/update_with_optional_subscription

Issue detail

The following cookie was issued by the application and is scoped to a parent of the issuing domain:

_thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:48:50 GMT; HttpOnly

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

POST /user_demographics/update_with_optional_subscription HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/user_demographics/demographic_form_banner.html?addx=test@fastdial.net&_=1298999611622
Cache-Control: max-age=0
Origin: http://www.groupon.com
Content-Type: application/x-www-form-urlencoded
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.19.2.1299001244132; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; adchemy_id=; division=san-jose; email=test%40fastdial.net; _thepoint=c34d720c801b2b00e49f006c1240e874
Content-Length: 165

_method=put&user_profile%5Buser_identity%5D%5Bgender%5D=&user_profile%5Buser_identity%5D%5Bbirth_year%5D=&user_profile%5Buser_identity%5D%5Bzipcode%5D=&commit=Submit

Response

HTTP/1.1 302 Moved Temporarily
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:48:50 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:48:50 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:48:50 GMT; HttpOnly
Status: 302
Location: http://www.groupon.com/user_demographics/demographic_form_banner.html?addx=test@fastdial.net&_=1298999611622
X-Runtime: 88
Cache-Control: no-cache
Content-Length: 178
Connection: keep-alive

<html><body>You are being <a href="http://www.groupon.com/user_demographics/demographic_form_banner.html?addx=test@fastdial.net&_=1298999611622">redirected</a>.</body></html>

4. Cross-domain Referer leakage previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/deals/pure-barre-los-gatos-1

Issue detail

The page was loaded from a URL containing a query string:

http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1?utm_medium=email&utm_source=newsletter&c=title&addx=test@fastdial.net&utm_content=san-jose_feed&user=test@fastdial.net&d=deal&divison=san-jose&s=more_deals_for_you&p=0&date=20110301

The response contains the following links to other domains:

http://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/jquery-ui.min.js
http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js
http://assets1.grouponcdn.com/assets/application.js?TejW351l
http://assets1.grouponcdn.com/assets/deal_page.js?bjmlvcjw
http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY
http://assets1.grouponcdn.com/favicon.ico?Jzth5gNo
http://assets1.grouponcdn.com/groupon.ico?Jzth5gNo
http://assets1.grouponcdn.com/images/groupon/icons/hourglass/hourglass002.gif?7cD-xrqw
http://assets1.grouponcdn.com/images/groupon/icons/icon_house.gif?rWAapTMb
http://assets1.grouponcdn.com/images/groupon/icons/small_price_tag.gif?-yiwnt5m
http://assets1.grouponcdn.com/images/groupon/icons/tipometer/check_mark.png?SxxwvrIa
http://assets1.grouponcdn.com/images/groupon/merchants/groupon-promise.png?axl8XglH
http://assets1.grouponcdn.com/images/groupon/overlays/btn/x-close-large.png?WcTqZeiv
http://assets1.grouponcdn.com/images/groupon/price_tag_view.png?AFizOWHs
http://assets1.grouponcdn.com/images/site_images/0616/9903/Pure-Barre4_Los-Gatos.jpg?BPAIUc4q
http://assets1.grouponcdn.com/images/site_images/0633/1101/San-Jose-Chamber-Orchestra2_grid_3.jpg?J-fAnUdp
http://assets1.grouponcdn.com/images/site_images/0633/1101/San-Jose-Chamber-Orchestra2_sidedeal.jpg?4vgl9c9M
http://assets1.grouponcdn.com/images/site_images/0634/5347/Poppy-Hills-Golf-Course-_San-Jose__grid_3.jpg?3ma1AvCV
http://assets1.grouponcdn.com/images/site_images/0634/5347/Poppy-Hills-Golf-Course-_San-Jose__sidedeal.jpg?PDspCgb9
http://assets1.grouponcdn.com/images/site_images/0637/2701/Cinequest2_grid_3.jpg?C8zL7Zgu
http://assets1.grouponcdn.com/images/site_images/0637/2701/Cinequest2_sidedeal.jpg?nIHr26-E
http://assets1.grouponcdn.com/images/site_images/0637/5868/Specialty-Sports-Colorado-Ski-and-Golf_-Breeze_Any-Mountain-The-Great-Outdoor-Store2_grid_3.jpg?Ej7prn5J
http://assets1.grouponcdn.com/images/site_images/0637/5868/Specialty-Sports-Colorado-Ski-and-Golf_-Breeze_Any-Mountain-The-Great-Outdoor-Store2_sidedeal.jpg?8nHrEKgi
http://assets1.grouponcdn.com/javascripts/app/deals/show.js?hPqXFwmo
http://assets1.grouponcdn.com/javascripts/common/demographic_form_banner.js?oflEbeJc
http://assets1.grouponcdn.com/javascripts/common/tooltip.js?YQelxRZ9
http://assets1.grouponcdn.com/stylesheets/app/deals/show.css?mWGaSnRG
http://assets1.grouponcdn.com/stylesheets/base.css?-r1wfD6Q
http://feeds.feedburner.com/grouponsan-jose
http://gr.pn/eXYRSA
http://groupon.ca/
http://latimesblogs.latimes.com/holiday-gift-guide/2009/11/pure-barre-offers-discounted-packages-for-the-holidays.html
http://maps.google.com/maps/api/staticmap?size=186x186&sensor=false&markers=color:red|size:mid|37.223461,-121.981903
http://maps.google.com/maps/api/staticmap?size=280x280&sensor=false&markers=color:red|size:mid|37.223461,-121.981903
http://maps.google.com/maps?f=d&daddr=50+University+Ave.+Suite+B-101+Los+Gatos+California+95030
http://platform.twitter.com/widgets.js
http://purebarre.com/p-people.html
http://twitter.com/share?url=http%3A%2F%2Fwww.groupon.com%2Fgroupon_says%2Fgroupon-says-33063426&text=Is%20showing%20up%20for%20a%20party%20a%20day%20early%20considered%20...fashionably%20early...%3F%20-%20
http://twitter.com/share?url=http%3A%2F%2Fwww.groupon.com%2Fsan-jose%2Fdeals%2Fpure-barre-los-gatos-1%3Futm_campaign%3DVisitorReferral%26amp%3Butm_medium%3Dtwitter%26amp%3Butm_source%3Danonymous&text=%2440%20for%20Four%20Body-Toning%2C%20Fat-Burning%20Workout%20Classes%20at%20Pure%20Barre%20%20-%20%2488%20Value...
http://www.atlaspost.com/buy
http://www.beeconomic.com.ph/
http://www.cafepress.com/groupon
http://www.citydeal.fi/
http://www.citydeal.ie/
http://www.citydeal.it/
http://www.clandescuento.com/countries/s/chile
http://www.clubeurbano.com.br/
http://www.facebook.com/grouponsanjose
http://www.flickr.com/photos/grouponcorporate/sets
http://www.groupon.at/
http://www.groupon.be/
http://www.groupon.ch/
http://www.groupon.de/
http://www.groupon.es/
http://www.groupon.fr/
http://www.groupon.gr/
http://www.groupon.jp/
http://www.groupon.nl/
http://www.groupon.pl/
http://www.groupon.se/
http://www.groupon.sg/
http://www.grouponworks.com/
http://www.la.com/ci_12185175?source=rss
http://www.la2day.com/health_beauty/pure_barre_sets_the_bar_for_results_oriented_workouts
http://www.liveoffgroupon.com/
http://www.meetup.com/groupon
http://www.mycitydeal.dk/
http://www.mycitydeal.no/
http://www.purebarre.com/CA-losgatos/index.html
http://www.sehirfirsati.com/
http://www.twitter.com/grouponsanjose
http://www.ubuyibuy.com/
http://www.yelp.com/biz/pure-barre-los-gatos-los-gatos
https://clients.mindbodyonline.com/asp/home.asp?studioid=8734

Issue background

When a web browser makes a request for a resource, it typically adds an HTTP header, called the "Referer" header, indicating the URL of the resource from which the request originated. This occurs in numerous situations, for example when a web page loads an image or script, or when a user clicks on a link or submits a form.

If the resource being requested resides on a different domain, then the Referer header is still generally included in the cross-domain request. If the originating URL contains any sensitive information within its query string, such as a session token, then this information will be transmitted to the other domain. If the other domain is not fully trusted by the application, then this may lead to a security compromise.

You should review the contents of the information being transmitted to other domains, and also determine whether those domains are fully trusted by the originating application.

Today's browsers may withhold the Referer header in some situations (for example, when loading a non-HTTPS resource from a page that was loaded over HTTPS, or when a Refresh directive is issued), but this behaviour should not be relied upon to protect the originating URL from disclosure.

Note also that if users can author content within the application then an attacker may be able to inject links referring to a domain they control in order to capture data from URLs used within the application.

Issue remediation

The application should never transmit any sensitive information within the URL query string. In addition to being leaked in the Referer header, such information may be logged in various locations and may be visible on-screen to untrusted parties.

Request

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:13:00 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: subscriber_email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:00 GMT
Set-Cookie: utm_term=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpmed=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: utm_campaign=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: b=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: external_uid=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpref=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpoid=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpref2=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpuid=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: utm_source=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: utm_content=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: utm_medium=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpcid=; domain=.groupon.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _tpaid=newsletter; domain=.groupon.com; path=/; expires=Tue, 08-Mar-2011 17:13:00 GMT
Set-Cookie: adchemy_id=; path=/
Set-Cookie: _tpmed=email; domain=.groupon.com; path=/; expires=Tue, 08-Mar-2011 17:13:00 GMT
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:13:00 GMT
Set-Cookie: s=29108ae4-4427-11e0-ae71-005056952866; path=/
Set-Cookie: email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:00 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: email=test%40fastdial.net; path=/; expires=Fri, 01-Apr-2011 17:13:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:13:00 GMT; HttpOnly
Status: 200
ETag: "2c59701df41e4f9c877f397fdffda210"
X-S-COOKIE: 29108ae4-4427-11e0-ae71-005056952866
X-Runtime: 161
Cache-Control: private, max-age=0, must-revalidate
Connection: close

<!DOCTYPE html>


<script src="http://assets1.grouponcdn.com/javascripts/common/tooltip.js?YQelxRZ9" type="text/javascript"></script>
<script src="http://assets1.grouponcdn.com/assets/deal_page.js?bjmlvcjw" type="text/javascript"></script>
<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>
<script src="http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY" type="text/javascript"></script>
...[SNIP]...
</script>
<script src="http://assets1.grouponcdn.com/javascripts/app/deals/show.js?hPqXFwmo" type="text/javascript"></script>
<script src="http://assets1.grouponcdn.com/javascripts/common/demographic_form_banner.js?oflEbeJc" type="text/javascript"></script>
...[SNIP]...

5. Cross-domain script include previous next
There are 3 instances of this issue:

/contact-us
/san-jose/
/san-jose/deals/pure-barre-los-gatos-1

Issue background

When an application includes a script from an external domain, this script is executed by the browser within the security context of the invoking application. The script can therefore do anything that the application's own scripts can do, such as accessing application data and performing actions within the context of the current user.

If you include a script from an external domain, then you are trusting that domain with the data and functionality of your application, and you are trusting the domain's own security to prevent an attacker from modifying the script to perform malicious actions within your application.

Issue remediation

Scripts should not be included from untrusted domains. If you have a requirement which a third-party script appears to fulfil, then you should ideally copy the contents of that script onto your own domain and include it from there. If that is not possible (e.g. for licensing reasons) then you should consider reimplementing the script's functionality within your own code.

5.1. http://www.groupon.com/contact-us previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/contact-us

Issue detail

The response dynamically includes the following scripts from other domains:

http://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/jquery-ui.min.js
http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js
http://assets1.grouponcdn.com/assets/application.js?TejW351l
http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY

Request

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:40:42 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:40:42 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:40:42 GMT; HttpOnly
Status: 200
ETag: "f4bef76d1e8d99bfb5a5cc7d791ac08d"
X-Runtime: 105
Cache-Control: private, max-age=0, must-revalidate
Connection: close

<!DOCTYPE html>



<script src="http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY" type="text/javascript"></script>
...[SNIP]...

5.2. http://www.groupon.com/san-jose/ previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/

Issue detail

The response dynamically includes the following scripts from other domains:

http://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/jquery-ui.min.js
http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js
http://assets1.grouponcdn.com/assets/application.js?TejW351l
http://assets1.grouponcdn.com/assets/deal_page.js?bjmlvcjw
http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY
http://assets1.grouponcdn.com/javascripts/common/demographic_form_banner.js?oflEbeJc
http://assets1.grouponcdn.com/javascripts/common/tooltip.js?YQelxRZ9
http://platform.twitter.com/widgets.js

Request

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Tue, 01 Mar 2011 17:40:28 GMT
Content-Type: text/html; charset=utf-8
Set-Cookie: adchemy_id=; path=/
Set-Cookie: division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:40:27 GMT
Set-Cookie: mobile=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT
Set-Cookie: _thepoint=c34d720c801b2b00e49f006c1240e874; domain=.groupon.com; path=/; expires=Wed, 02 Mar 2011 17:40:28 GMT; HttpOnly
Status: 200
ETag: "e2d7edd61244c8eac92a3b10778e00fc"
X-Runtime: 737
Cache-Control: private, max-age=0, must-revalidate
Connection: close

<!DOCTYPE html>


<script src="http://assets1.grouponcdn.com/javascripts/common/tooltip.js?YQelxRZ9" type="text/javascript"></script>
<script src="http://assets1.grouponcdn.com/assets/deal_page.js?bjmlvcjw" type="text/javascript"></script>
<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>
<script src="http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY" type="text/javascript"></script>
...[SNIP]...
</script>

<script src="http://assets1.grouponcdn.com/javascripts/common/demographic_form_banner.js?oflEbeJc" type="text/javascript"></script>
...[SNIP]...

5.3. http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1 previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/deals/pure-barre-los-gatos-1

Issue detail

The response dynamically includes the following scripts from other domains:

http://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/jquery-ui.min.js
http://ajax.microsoft.com/ajax/jquery.validate/1.7/jquery.validate.js
http://assets1.grouponcdn.com/assets/application.js?TejW351l
http://assets1.grouponcdn.com/assets/deal_page.js?bjmlvcjw
http://assets1.grouponcdn.com/assets/facebook.js?rpq--NbY
http://assets1.grouponcdn.com/javascripts/app/deals/show.js?hPqXFwmo
http://assets1.grouponcdn.com/javascripts/common/demographic_form_banner.js?oflEbeJc
http://assets1.grouponcdn.com/javascripts/common/tooltip.js?YQelxRZ9
http://platform.twitter.com/widgets.js

Request

Response

6. Cookie without HttpOnly flag set previous next
There are 7 instances of this issue:

/
/contact-us
/san-jose/
/san-jose/deals/pure-barre-los-gatos-1
/user_demographics/demographic_form_banner.html
/user_demographics/dismiss
/user_demographics/update_with_optional_subscription

Issue background

If the HttpOnly attribute is set on a cookie, then the cookie's value cannot be read or set by client-side JavaScript. This measure can prevent certain client-side attacks, such as cross-site scripting, from trivially capturing the cookie's value via an injected script.

Issue remediation

There is usually no good reason not to set the HttpOnly flag on all cookies. Unless you specifically require legitimate client-side scripts within your application to read or set a cookie's value, you should set the HttpOnly flag by including this attribute within the relevant Set-cookie directive.

You should be aware that the restrictions imposed by the HttpOnly flag can potentially be circumvented in some circumstances, and that numerous other serious attacks can be delivered by client-side script injection, aside from simple cookie stealing.

6.1. http://www.groupon.com/ previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/

Issue detail

The following cookie was issued by the application and does not have the HttpOnly flag set:

division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:40:27 GMT

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

Response

6.2. http://www.groupon.com/contact-us previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/contact-us

Issue detail

The following cookie was issued by the application and does not have the HttpOnly flag set:

division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:40:42 GMT

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

Response

6.3. http://www.groupon.com/san-jose/ previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/

Issue detail

The following cookie was issued by the application and does not have the HttpOnly flag set:

division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:40:27 GMT

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

Response

6.4. http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1 previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/san-jose/deals/pure-barre-los-gatos-1

Issue detail

The following cookies were issued by the application and do not have the HttpOnly flag set:

subscriber_email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:00 GMT
_tpaid=newsletter; domain=.groupon.com; path=/; expires=Tue, 08-Mar-2011 17:13:00 GMT
_tpmed=email; domain=.groupon.com; path=/; expires=Tue, 08-Mar-2011 17:13:00 GMT
division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:13:00 GMT
s=29108ae4-4427-11e0-ae71-005056952866; path=/
email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:00 GMT
email=test%40fastdial.net; path=/; expires=Fri, 01-Apr-2011 17:13:00 GMT

The cookies do not appear to contain session tokens, which may reduce the risk associated with this issue. You should review the contents of the cookies to determine their function.

Request

Response

6.5. http://www.groupon.com/user_demographics/demographic_form_banner.html previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/demographic_form_banner.html

Issue detail

The following cookies were issued by the application and do not have the HttpOnly flag set:

subscriber_email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:24 GMT
division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:13:24 GMT
email=test%40fastdial.net; path=/; expires=Mon, 01-Mar-2021 17:13:24 GMT

The cookies do not appear to contain session tokens, which may reduce the risk associated with this issue. You should review the contents of the cookies to determine their function.

Request

GET /user_demographics/demographic_form_banner.html?addx=test@fastdial.net&_=1298999611622 HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1?utm_medium=email&utm_source=newsletter&c=title&addx=test@fastdial.net&utm_content=san-jose_feed&user=test@fastdial.net&d=deal&divison=san-jose&s=more_deals_for_you&p=0&date=20110301
x-requested-with: XMLHttpRequest
content-type: application/x-www-form-urlencoded
accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _chartbeat2=sq6k5rzuuoqiwvy6; subscriber_email=test%40fastdial.net; _tpaid=newsletter; adchemy_id=; _tpmed=email; division=san-jose; s=29108ae4-4427-11e0-ae71-005056952866; email=test%40fastdial.net; _thepoint=c34d720c801b2b00e49f006c1240e874; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.1.10.1298999612

Response

6.6. http://www.groupon.com/user_demographics/dismiss previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/dismiss

Issue detail

The following cookie was issued by the application and does not have the HttpOnly flag set:

division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:48:47 GMT

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

Response

6.7. http://www.groupon.com/user_demographics/update_with_optional_subscription previous

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/user_demographics/update_with_optional_subscription

Issue detail

The following cookie was issued by the application and does not have the HttpOnly flag set:

division=san-jose; path=/; expires=Fri, 01-Apr-2011 17:48:50 GMT

The cookie does not appear to contain a session token, which may reduce the risk associated with this issue. You should review the contents of the cookie to determine its function.

Request

Response

7. Email addresses disclosed previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://www.groupon.com
Path:	/contact-us

Issue detail

The following email addresses were disclosed in the response:

press@groupon.com
support@groupon.com

Issue background

The presence of email addresses within application responses does not necessarily constitute a security vulnerability. Email addresses may appear intentionally within contact information, and many applications (such as web mail) include arbitrary third-party email addresses within their core content.

However, email addresses of developers and other individuals (whether appearing on-screen or hidden within page source) may disclose information that is useful to an attacker; for example, they may represent usernames that can be used at the application's login, and they may be used in social engineering attacks against the organisation's personnel. Unnecessary or excessive disclosure of email addresses may also lead to an increase in the volume of spam email received.

Issue remediation

You should review the email addresses being disclosed by the application, and consider removing any that are unnecessary, or replacing personal addresses with anonymous mailbox addresses (such as helpdesk@example.com).

Request

Response

8. Content type incorrectly stated previous

Summary

Severity:	Information
Confidence:	Firm
Host:	http://www.groupon.com
Path:	/deals/pure-barre-los-gatos-1/deal_status.json

Issue detail

The response contains the following Content-type statement:

Content-Type: application/json; charset=utf-8

The response states that it contains JSON. However, it actually appears to contain HTML.

Issue background

If a web response specifies an incorrect content type, then browsers may process the response in unexpected ways. If the specified content type is a renderable text-based format, then the browser will usually attempt to parse and render the response in that format. If the specified type is an image format, then the browser will usually detect the anomaly and will analyse the actual content and attempt to determine its MIME type. Either case can lead to unexpected results, and if the content contains any user-controllable data may lead to cross-site scripting or other client-side vulnerabilities.

In most cases, the presence of an incorrect content type statement does not constitute a security flaw, particularly if the response contains static content. You should review the contents of the response and the context in which it appears to determine whether any vulnerability exists.

Issue remediation

For every response containing a message body, the application should include a single Content-type header which correctly and unambiguously states the MIME type of the content in the response body.

Request

GET /deals/pure-barre-los-gatos-1/deal_status.json HTTP/1.1
Host: www.groupon.com
Proxy-Connection: keep-alive
Referer: http://www.groupon.com/san-jose/deals/pure-barre-los-gatos-1?utm_medium=email&utm_source=newsletter&c=title&addx=test@fastdial.net&utm_content=san-jose_feed&user=test@fastdial.net&d=deal&divison=san-jose&s=more_deals_for_you&p=0&date=20110301
x-requested-with: XMLHttpRequest
content-type: application/x-www-form-urlencoded
accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.13 (KHTML, like Gecko) Chrome/9.0.597.107 Safari/534.13
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: b=2148c93a-394a-11e0-aca6-005056951763; visited=true; _tpaid=newsletter; _tpmed=email; s=29108ae4-4427-11e0-ae71-005056952866; __utmz=44473723.1298999612.2.5.utmcsr=newsletter|utmccn=(not%20set)|utmcmd=email|utmcct=san-jose_feed; __utma=44473723.1103413385.1297805149.1297805149.1298999612.2; __utmc=44473723; __utmv=44473723.|2=Exp-default=1250235324%2F2=1,; __utmb=44473723.9.2.1298999613665; subscriber_email=test%40fastdial.net; adchemy_id=; division=san-jose; email=test%40fastdial.net; _thepoint=c34d720c801b2b00e49f006c1240e874; _chartbeat2=sq6k5rzuuoqiwvy6

Response

HTTP/1.1 200 OK
Server: nginx/0.7.65
Content-Type: application/json; charset=utf-8
Status: 200
ETag: "229722a1959db23513932e874f89324c"
X-Runtime: 15
Cache-Control: max-age=60, public
Age: 36
Date: Tue, 01 Mar 2011 17:18:23 GMT
Expires: Tue, 01 Mar 2011 17:18:47 GMT
Connection: keep-alive
Content-Length: 769

{"deal_day":3,"deal_hour":7,"deal_min":59,"number_sold_container":"\n<table class='status'>\n <tr class=\"sum\"><td class=\"left\"><span class=\"number\">196</span></td><td class=\"right\"> bought</t
...[SNIP]...

Report generated by XSS.CX Research Blog at Tue Mar 01 13:30:57 CST 2011.