Report generated by CloudScan Vulnerability Crawler at Tue Jan 25 19:28:46 CST 2011.

The DORK Report

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1. Cross-site scripting (reflected)

2. Cross-domain Referer leakage

3. Email addresses disclosed

4. Content type incorrectly stated

4.1. http://ads.gmodules.com/gadgets/ifr

4.2. http://ads.gmodules.com/gadgets/makeRequest


1. Cross-site scripting (reflected)  next

Summary

Severity:   High
Confidence:   Certain
Host:   http://ads.gmodules.com
Path:   /gadgets/ifr

Issue detail

The value of the url request parameter is copied into a JavaScript rest-of-line comment. The payload 125f6%0aalert(1)//47c7f0d831b was submitted in the url parameter. This input was echoed as 125f6
alert(1)//47c7f0d831b in the application's response.

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

Remediation detail

Echoing user-controllable data within a script context is inherently dangerous and can make XSS attacks difficult to prevent. If at all possible, the application should avoid echoing user data within this context.

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.

Remediation background

In most situations where user-controllable data is copied into application responses, cross-site scripting attacks can be prevented using two layers of defenses: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 /gadgets/ifr?synd=ads&url=http%3A%2F%2Fwww.ljmsite.com%2Fgoogle%2Fgadgetads%2Fkayak2%2F728x90.xml125f6%0aalert(1)//47c7f0d831b&lang=en&country=US&up_clickurl=http://googleads.g.doubleclick.net/aclk%3Fsa%3Dl%26ai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26num%3D1%26ggladgrp%3D10345345168030795840%26gglcreat%3D9988352204398423926%26sig%3DAGiWqtx_MMUhrwT9GMn6hHLnk8PZwdyM9g%26client%3Dca-pub-4103679352234073%26adurl%3D&up_aiturl=http://googleads.g.doubleclick.net/pagead/conversion/%3Fai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26sigh%3Dc3WzeS_619k%26label%3D_AITNAME_%26value%3D_AITVALUE_&up_ads_clicktarget_new_=1&up_rawquery=las%20vegas%20hotel%20promotions&up_city=Washington&up_region=US-DC&up_lat=38.90&up_long=-77.04\ HTTP/1.1
Host: ads.gmodules.com
Accept: */*
Accept-Language: en
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Connection: close

Response

HTTP/1.1 400 Bad Request
P3P: CP="CAO PSA OUR"
Content-Type: text/html; charset=UTF-8
Date: Wed, 19 Jan 2011 18:05:28 GMT
Expires: Wed, 19 Jan 2011 18:05:28 GMT
Cache-Control: private, max-age=0
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: GSE
Connection: close

Unable to retrieve spec for http://www.ljmsite.com/google/gadgetads/kayak2/728x90.xml125f6
alert(1)//47c7f0d831b. HTTP error 400
2. Cross-domain Referer leakage  previous  next

Summary

Severity:   Information
Confidence:   Certain
Host:   http://ads.gmodules.com
Path:   /gadgets/ifr

Issue detail

The page was loaded from a URL containing a query string:The response contains the following links to other domains:

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

GET /gadgets/ifr?synd=ads&url=http%3A%2F%2Fwww.ljmsite.com%2Fgoogle%2Fgadgetads%2Fkayak2%2F728x90.xml&lang=en&country=US&up_clickurl=http://googleads.g.doubleclick.net/aclk%3Fsa%3Dl%26ai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26num%3D1%26ggladgrp%3D10345345168030795840%26gglcreat%3D9988352204398423926%26sig%3DAGiWqtx_MMUhrwT9GMn6hHLnk8PZwdyM9g%26client%3Dca-pub-4103679352234073%26adurl%3D&up_aiturl=http://googleads.g.doubleclick.net/pagead/conversion/%3Fai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26sigh%3Dc3WzeS_619k%26label%3D_AITNAME_%26value%3D_AITVALUE_&up_ads_clicktarget_new_=1&up_rawquery=las%20vegas%20hotel%20promotions&up_city=Washington&up_region=US-DC&up_lat=38.90&up_long=-77.04 HTTP/1.1
Host: ads.gmodules.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/534.10 (KHTML, like Gecko) Chrome/8.0.552.237 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

Response

HTTP/1.1 200 OK
P3P: CP="CAO PSA OUR"
Content-Type: text/html; charset=UTF-8
Expires: Wed, 19 Jan 2011 17:59:42 GMT
Cache-Control: private,max-age=300
Date: Wed, 19 Jan 2011 17:54:42 GMT
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: GSE
Content-Length: 103345

<html><head><style type="text/css">body,td,div,span,p{font-family:arial,sans-serif;}a {color:#0000cc;}a:visited {color:#551a8b;}a:active {color:#ff0000;}body{margin: 0px;padding: 0px;background-color:
...[SNIP]...
<td style="vertical-align:top;font-size:9pt;">
This is an new
<a href="http://www.google.com/adwords/gadgetads/" target="_blank">gadget ad</a>
...[SNIP]...
y have noticed that it shows airfare deals with flights
from an airport near you to a destination matching the page content
-- this uses the same technology used by AdWords for
<a href="http://adwords.google.com/support/bin/answer.py?answer=6102" target="_blank">location targeting</a>
...[SNIP]...
3. Email addresses disclosed  previous  next

Summary

Severity:   Information
Confidence:   Certain
Host:   http://ads.gmodules.com
Path:   /gadgets/makeRequest

Issue detail

The following email address was disclosed in the response:

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

GET /gadgets/makeRequest?refresh=1800&url=http%3A%2F%2Fwww.kayak.com%2Fh%2Frss%2Fadfare%3Forig%3DWAS%26dest%3DLAS%26mc%3DUSD&httpMethod=GET&headers=&postData=&authz=&st=&contentType=DOM&numEntries=3&getSummaries=false&signOwner=true&signViewer=true&gadget=http%3A%2F%2Fwww.ljmsite.com%2Fgoogle%2Fgadgetads%2Fkayak2%2F728x90.xml&container=ads&bypassSpecCache=&getFullHeaders=false HTTP/1.1
Host: ads.gmodules.com
Proxy-Connection: keep-alive
Referer: http://ads.gmodules.com/gadgets/ifr?synd=ads&url=http%3A%2F%2Fwww.ljmsite.com%2Fgoogle%2Fgadgetads%2Fkayak2%2F728x90.xml&lang=en&country=US&up_clickurl=http://googleads.g.doubleclick.net/aclk%3Fsa%3Dl%26ai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26num%3D1%26ggladgrp%3D10345345168030795840%26gglcreat%3D9988352204398423926%26sig%3DAGiWqtx_MMUhrwT9GMn6hHLnk8PZwdyM9g%26client%3Dca-pub-4103679352234073%26adurl%3D&up_aiturl=http://googleads.g.doubleclick.net/pagead/conversion/%3Fai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26sigh%3Dc3WzeS_619k%26label%3D_AITNAME_%26value%3D_AITVALUE_&up_ads_clicktarget_new_=1&up_rawquery=las%20vegas%20hotel%20promotions&up_city=Washington&up_region=US-DC&up_lat=38.90&up_long=-77.04
Accept: */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.237 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

Response

HTTP/1.1 200 OK
Expires: Wed, 19 Jan 2011 17:55:00 GMT
Content-Disposition: attachment;filename=p.txt
Content-Type: application/json; charset=UTF-8
Date: Wed, 19 Jan 2011 17:25:00 GMT
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE
Cache-Control: public,max-age=1800
Age: 1782
Content-Length: 2852

throw 1; < don't be evil' >{"http://www.kayak.com/h/rss/adfare?orig=WAS&dest=LAS&mc=USD":{"headers":{"set-cookie":["cluster=2; Path=/"]},"body":"\u003c?xml version=\"1.0\"?\u003e\n\u003crss version=\"
...[SNIP]...
ubDate\u003e\n \u003clastBuildDate\u003eTue, 18 Jan 2011 19:00:00 EST\u003c/lastBuildDate\u003e\n \u003cdocs\u003ehttp://www.kayak.com/h/labs/rss\u003c/docs\u003e\n \u003cmanagingEditor\u003ewebmaster@kayak.com\u003c/managingEditor\u003e\n \u003cwebMaster\u003ewebmaster@kayak.com\u003c/webMaster\u003e\n \u003citem\u003e\n \u003ctitle\u003eWAS to LAS $291 Jan 22 - 24 on United found today\u003c/title\u003e\n \u003clink\u003ehttp://www.kayak.com/in?ai=&amp;p
...[SNIP]...
4. Content type incorrectly stated  previous
There are 2 instances of this issue:

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.

4.1. http://ads.gmodules.com/gadgets/ifr  next

Summary

Severity:   Information
Confidence:   Firm
Host:   http://ads.gmodules.com
Path:   /gadgets/ifr

Issue detail

The response contains the following Content-type statement:The response states that it contains HTML. However, it actually appears to contain plain text.

Request

GET /gadgets/ifr HTTP/1.1
Host: ads.gmodules.com
Accept: */*
Accept-Language: en
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Connection: close

Response

HTTP/1.1 400 Bad Request
P3P: CP="CAO PSA OUR"
Content-Type: text/html; charset=UTF-8
Date: Wed, 19 Jan 2011 18:05:06 GMT
Expires: Wed, 19 Jan 2011 18:05:06 GMT
Cache-Control: private, max-age=0
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: GSE
Connection: close

Missing or malformed url parameter
4.2. http://ads.gmodules.com/gadgets/makeRequest  previous

Summary

Severity:   Information
Confidence:   Firm
Host:   http://ads.gmodules.com
Path:   /gadgets/makeRequest

Issue detail

The response contains the following Content-type statement:The response states that it contains JSON. However, it actually appears to contain plain text.

Request

GET /gadgets/makeRequest?refresh=3600&url=http%3A%2F%2Fgadgetadservices.appspot.com%2Fkayak%2Fadgroupdecode%3Fid%3D10345345168030795840&httpMethod=GET&headers=&postData=&authz=&st=&contentType=TEXT&numEntries=3&getSummaries=false&signOwner=true&signViewer=true&gadget=http%3A%2F%2Fwww.ljmsite.com%2Fgoogle%2Fgadgetads%2Fkayak2%2F728x90.xml&container=ads&bypassSpecCache=&getFullHeaders=false HTTP/1.1
Host: ads.gmodules.com
Proxy-Connection: keep-alive
Referer: http://ads.gmodules.com/gadgets/ifr?synd=ads&url=http%3A%2F%2Fwww.ljmsite.com%2Fgoogle%2Fgadgetads%2Fkayak2%2F728x90.xml&lang=en&country=US&up_clickurl=http://googleads.g.doubleclick.net/aclk%3Fsa%3Dl%26ai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26num%3D1%26ggladgrp%3D10345345168030795840%26gglcreat%3D9988352204398423926%26sig%3DAGiWqtx_MMUhrwT9GMn6hHLnk8PZwdyM9g%26client%3Dca-pub-4103679352234073%26adurl%3D&up_aiturl=http://googleads.g.doubleclick.net/pagead/conversion/%3Fai%3DBgKsxYCU3TenUF8qcqwGUz9mFBJbloLoB8IzKjxDAjbcBsNsGEAEYASCq9oUYOABQm9vQugFgyYajh9SjgBCgAcSR-u4DsgENd3d3LmxvY2FsLmNvbboBCTcyOHg5MF9hc8gBCdoBemh0dHA6Ly93d3cubG9jYWwuY29tL2RhcnQvP2FnPVRydWUmY3NzPWJhbm5lciZwPWxvY20uc3AmcG9zPTQmdD00JnN6PTcyOHg5MCZvcmQ9MTI5NTQ1OTcyNjE3MyZrPWxhdytvZmZpY2VzJmw9RGFsbGFzJTJDK1RY4AECuAIYyALmpc8XqAMB0QP5cQX6xDmFDPUDAAAAxMgEAQ%26sigh%3Dc3WzeS_619k%26label%3D_AITNAME_%26value%3D_AITVALUE_&up_ads_clicktarget_new_=1&up_rawquery=las%20vegas%20hotel%20promotions&up_city=Washington&up_region=US-DC&up_lat=38.90&up_long=-77.04
Accept: */*
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.237 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

Response

HTTP/1.1 200 OK
Expires: Wed, 19 Jan 2011 18:22:49 GMT
Content-Disposition: attachment;filename=p.txt
Content-Type: application/json; charset=UTF-8
Date: Wed, 19 Jan 2011 17:22:49 GMT
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE
Cache-Control: public,max-age=3600
Age: 1913
Content-Length: 226

throw 1; < don't be evil' >{"http://gadgetadservices.appspot.com/kayak/adgroupdecode?id=10345345168030795840":{"body":"\n\u003e/Las Vegas Hotel Promotions/Destination\u003c\n","DataHash":"0p5uvh202m3t
...[SNIP]...
Report generated by CloudScan Vulnerability Crawler at Tue Jan 25 19:28:46 CST 2011.