projects.webappsec.org, XSS, Cross Site Scripting

XSS in projects.webappsec.org | vulnerability Crawler Report

Report generated by CloudScan Vulnerability Crawler at Wed Jan 05 13:30:47 CST 2011.

CWE-79 XSS Report

1. Cross-site scripting (reflected)

2. Cross-domain script include

2.1. http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

2.2. http://projects.webappsec.org/w/page/13246986/a

3. Cookie without HttpOnly flag set

3.1. http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

3.2. http://projects.webappsec.org/w/page/13246986/a

4. Email addresses disclosed

4.1. http://projects.webappsec.org/api_v2/

4.2. http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

4.3. http://projects.webappsec.org/w/page/13246986/a

1. Cross-site scripting (reflected) next

Summary

Severity:	High
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

Issue detail

The value of REST URL parameter 4 is copied into the HTML document as plain text between tags. The payload 6a2d3<img%20src%3da%20onerror%3dalert(1)>cfec21d2271 was submitted in the REST URL parameter 4. This input was echoed as 6a2d3<img src=a onerror=alert(1)>cfec21d2271 in the application's response.

This proof-of-concept attack demonstrates that it is possible to inject arbitrary JavaScript into the application's response. The PoC attack demonstrated uses an event handler to introduce arbitrary JavaScript into the document.

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 /w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria6a2d3<img%20src%3da%20onerror%3dalert(1)>cfec21d2271 HTTP/1.1
Host: projects.webappsec.org
Accept: */*
Accept-Language: en
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Connection: close

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:04:20 GMT
Content-Type: text/html; charset=utf-8
Connection: close
Expires: Tue, 04 Jan 2011 19:04:19 GMT
Cache-Control: no-cache
Set-Cookie: pbj=e23b39fbc0e0db59f75179bede75001294254259; expires=Fri, 01-Jan-2038 00:00:00 GMT; path=/; domain=projects.webappsec.org
Content-Length: 102154

<!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">
<head>
<meta http-equiv="cont
...[SNIP]...
<b>Web-Application-Security-Scanner-Evaluation-Criteria6a2d3<img src=a onerror=alert(1)>cfec21d2271</b>
...[SNIP]...

2. Cross-domain script include previous next
There are 2 instances of this issue:

/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria
/w/page/13246986/a

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.

2.1. http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

Issue detail

The response dynamically includes the following scripts from other domains:

http://edge.quantserve.com/quant.js
http://vs1.pbworks.com/shared/statics/extras-v92300219.js
http://vs1.pbworks.com/shared/statics/libraries-v81030590.js
http://vs1.pbworks.com/shared/statics/packed-v89332005.js

Request

GET /w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria HTTP/1.1
Host: projects.webappsec.org
Accept: */*
Accept-Language: en
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Connection: close

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:04:03 GMT
Content-Type: text/html; charset=utf-8
Connection: close
Expires: Tue, 04 Jan 2011 19:04:03 GMT
Cache-Control: no-cache
Set-Cookie: pbj=9e4eeab0d19ff27603d15fc53e45001294254243; expires=Fri, 01-Jan-2038 00:00:00 GMT; path=/; domain=projects.webappsec.org
Content-Length: 102407

<!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">
<head>
<meta http-equiv="cont
...[SNIP]...
</script>
<script type="text/javascript" src="http://vs1.pbworks.com/shared/statics/libraries-v81030590.js"></script>
<script type="text/javascript" src="http://vs1.pbworks.com/shared/statics/packed-v89332005.js"></script>
<script type="text/javascript" src="http://vs1.pbworks.com/shared/statics/extras-v92300219.js"></script>
...[SNIP]...

<script type="text/javascript" src="http://edge.quantserve.com/quant.js"></script>
...[SNIP]...

2.2. http://projects.webappsec.org/w/page/13246986/a previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/a

Issue detail

The response dynamically includes the following scripts from other domains:

http://edge.quantserve.com/quant.js
http://vs1.pbworks.com/shared/statics/extras-v92300219.js
http://vs1.pbworks.com/shared/statics/libraries-v81030590.js
http://vs1.pbworks.com/shared/statics/packed-v89332005.js

Request

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:13:04 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Expires: Tue, 04 Jan 2011 19:13:04 GMT
Cache-Control: no-cache
Content-Length: 102044

<!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">
<head>
<meta http-equiv="cont
...[SNIP]...
</script>
<script type="text/javascript" src="http://vs1.pbworks.com/shared/statics/libraries-v81030590.js"></script>
<script type="text/javascript" src="http://vs1.pbworks.com/shared/statics/packed-v89332005.js"></script>
<script type="text/javascript" src="http://vs1.pbworks.com/shared/statics/extras-v92300219.js"></script>
...[SNIP]...

<script type="text/javascript" src="http://edge.quantserve.com/quant.js"></script>
...[SNIP]...

3. Cookie without HttpOnly flag set previous next
There are 2 instances of this issue:

/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria
/w/page/13246986/a

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.

3.1. http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

Issue detail

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

pbj=9e4eeab0d19ff27603d15fc53e45001294254243; expires=Fri, 01-Jan-2038 00:00:00 GMT; path=/; domain=projects.webappsec.org

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

3.2. http://projects.webappsec.org/w/page/13246986/a previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/a

Issue detail

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

pb_perfmon=deleted; expires=Tue, 05-Jan-2010 19:15:08 GMT; path=/

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 /w/page/13246986/a HTTP/1.1
Host: projects.webappsec.org
Proxy-Connection: keep-alive
Referer: http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria6a2d3%3Cimg%20src%3da%20onerror%3dalert(1)%3Ecfec21d2271
Accept: */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.224 Safari/534.10
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: __utmz=133238479.1294254741.1.1.utmcsr=burp|utmccn=(referral)|utmcmd=referral|utmcct=/show/4; __qca=P0-2111369018-1294254741494; pb_perfmon=%7B%22ts_c_hd_rcv%22%3A%20%221294254832917%22%2C%20%22ts_c_ft_rcv%22%3A%20%221294254833128%22%2C%20%22ts_s_req_st%22%3A%20%221294254856892%22%2C%20%22pt%22%3A%20%22view%22%2C%20%22ts_s_rend_st%22%3A%20%221294254857001%22%2C%20%22wiki%22%3A%20%22webappsec%22%2C%20%22sn%22%3A%20%2253152%22%2C%20%22ts_s_rend_fin%22%3A%20%221294254857012%22%2C%20%22ts_c_init_fin%22%3A%20%221294254833269%22%2C%20%22ts_c_load_fin%22%3A%20%221294254834464%22%7D; pb_unload_time=1294254861235; pbj=d00a0fb78902a9a5d3ef6817d15d001294254902; __utma=133238479.1947789848.1294254741.1294254741.1294254741.1; __utmc=133238479; __utmb=133238479.6.10.1294254741

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:15:09 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Set-Cookie: pb_perfmon=deleted; expires=Tue, 05-Jan-2010 19:15:08 GMT; path=/
Expires: Tue, 04 Jan 2011 19:15:09 GMT
Cache-Control: no-cache
Content-Length: 102044

<!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">
<head>
<meta http-equiv="cont
...[SNIP]...

4. Email addresses disclosed previous
There are 3 instances of this issue:

/api_v2/
/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria
/w/page/13246986/a

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).

4.1. http://projects.webappsec.org/api_v2/ previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/api_v2/

Issue detail

The following email address was disclosed in the response:

simone.onofri@gmail.com

Request

GET /api_v2/?count=7&pagetime=1294172903&filetime=1284389681&permtime=1292966135&foldertime=1270615867&commenttime=1280265064&_bt=1293751277&op=GetChanges HTTP/1.1
Host: projects.webappsec.org
Proxy-Connection: keep-alive
Referer: http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria6a2d3%3Cimg%20src%3da%20onerror%3dalert(document.cookie)%3Ecfec21d2271
X-Prototype-Version: 1.6.1
X-Requested-With: XMLHttpRequest
Accept: text/javascript, text/html, application/xml, text/xml, */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.224 Safari/534.10
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: pbj=37794d22f217b81f476b5ddc89dd001294254760; __utmz=133238479.1294254741.1.1.utmcsr=burp|utmccn=(referral)|utmcmd=referral|utmcct=/show/4; __utma=133238479.1947789848.1294254741.1294254741.1294254741.1; __utmc=133238479; __utmb=133238479.1.10.1294254741; __qca=P0-2111369018-1294254741494

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:12:50 GMT
Content-Type: application/json
Connection: keep-alive
Expires: Thu, 01 Jan 2037 00:00:00 GMT
Cache-Control: private, max-age=1209600
Vary: Accept-Encoding
Content-Length: 4032

/*-secure-
{"_auth_role":"read","_auth_via":"cookie","_perm_cache_times":{"pagetime":1294172903,"filetime":1284389681,"permtime":1292966135,"foldertime":1270615867,"commenttime":1280265064},"_permanently_cachable_response":true,"changes":[{"hash":"zGyXa7Ygloqp","user":{"perm":"write","name":"Simone Onofri","first_name":"Simone","last_name":"Onofri","email":"simone.onofri@gmail.com","image":"http:\/\/img.pbworks.com\/uimg.php?u=394837079be985b15d0b53e40a7c88b844379902&v=1277858266&sq=yes","lastview":1294176900,"lastviewtext":"21 hours","is_verified":true,"uid":"80a28eb872e8bd1a3
...[SNIP]...
otection-Working","type":"page","title":"Insufficient Data Protection Working"},{"hash":"gOBuF4IYBsXK","user":{"perm":"write","name":"Simone Onofri","first_name":"Simone","last_name":"Onofri","email":"simone.onofri@gmail.com","image":"http:\/\/img.pbworks.com\/uimg.php?u=394837079be985b15d0b53e40a7c88b844379902&v=1277858266&sq=yes","lastview":1294176900,"lastviewtext":"21 hours","is_verified":true,"uid":"80a28eb872e8bd1a3
...[SNIP]...
otection-Working","type":"page","title":"Insufficient Data Protection Working"},{"hash":"yRnVLeGWNLXZ","user":{"perm":"write","name":"Simone Onofri","first_name":"Simone","last_name":"Onofri","email":"simone.onofri@gmail.com","image":"http:\/\/img.pbworks.com\/uimg.php?u=394837079be985b15d0b53e40a7c88b844379902&v=1277858266&sq=yes","lastview":1294176900,"lastviewtext":"21 hours","is_verified":true,"uid":"80a28eb872e8bd1a3
...[SNIP]...

4.2. http://projects.webappsec.org/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria previous next

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/Web-Application-Security-Scanner-Evaluation-Criteria

Issue detail

The following email address was disclosed in the response:

bshura73@gmail.com

Request

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:04:03 GMT
Content-Type: text/html; charset=utf-8
Connection: close
Expires: Tue, 04 Jan 2011 19:04:03 GMT
Cache-Control: no-cache
Set-Cookie: pbj=9e4eeab0d19ff27603d15fc53e45001294254243; expires=Fri, 01-Jan-2038 00:00:00 GMT; path=/; domain=projects.webappsec.org
Content-Length: 102407

<!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">
<head>
<meta http-equiv="cont
...[SNIP]...
times":{"pagetime":1294172903,"foldertime":1270615867,"permtime":1292966135},"_valid_as_of":"1294254243","author":{"perm":"write","name":"Brian Shura","first_name":"Brian","last_name":"Shura","email":"bshura73@gmail.com","image":"http:\/\/projects.webappsec.org\/uimg\/bread.png","lastview":1290998400,"lastviewtext":"1 month","is_verified":true,"uid":"a2f52aec52fa11b16dff50f730875c33037f3e06"},"current_revision":12693
...[SNIP]...

4.3. http://projects.webappsec.org/w/page/13246986/a previous

Summary

Severity:	Information
Confidence:	Certain
Host:	http://projects.webappsec.org
Path:	/w/page/13246986/a

Issue detail

The following email address was disclosed in the response:

bshura73@gmail.com

Request

Response

HTTP/1.1 200 OK
Server: nginx/0.6.32
Date: Wed, 05 Jan 2011 19:13:04 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Expires: Tue, 04 Jan 2011 19:13:04 GMT
Cache-Control: no-cache
Content-Length: 102044

<!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">
<head>
<meta http-equiv="cont
...[SNIP]...
times":{"pagetime":1294172903,"foldertime":1270615867,"permtime":1292966135},"_valid_as_of":"1294254784","author":{"perm":"write","name":"Brian Shura","first_name":"Brian","last_name":"Shura","email":"bshura73@gmail.com","image":"http:\/\/projects.webappsec.org\/uimg\/bread.png","lastview":1290998400,"lastviewtext":"1 month","is_verified":true,"uid":"a2f52aec52fa11b16dff50f730875c33037f3e06"},"current_revision":12693
...[SNIP]...

Report generated by CloudScan Vulnerability Crawler at Wed Jan 05 13:30:47 CST 2011.