Difference between revisions of "Forced browsing"

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(Example 2)
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==Related [[Threat Agents]]==
 
==Related [[Threat Agents]]==
 
 
* [[Internal software developer]]
 
* [[Internal software developer]]
  
 
==Related [[Attacks]]==
 
==Related [[Attacks]]==
 
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* [[Path Traversal]]
*[[Path Traversal]]
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* [[Path Manipulation]]
*[[Path Manipulation]]
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==Related [[Vulnerabilities]]==
 
==Related [[Vulnerabilities]]==
 
 
* [[:Category:Access Control Vulnerability]]
 
* [[:Category:Access Control Vulnerability]]
  
 
==Related [[Controls]]==
 
==Related [[Controls]]==
 
 
* [[:Category: Access Control]]
 
* [[:Category: Access Control]]
  
 
==References==
 
==References==
 
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* Forceful Browsing – Imperva Application Data Security and Compliance http://www.imperva.com/application_defense_center/glossary/forceful_browsing.html
*Forceful Browsing – Imperva Application Data Security and Compliance http://www.imperva.com/application_defense_center/glossary/forceful_browsing.html
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* Parameter fuzzing and forced browsing – WebAppSec - http://seclists.org/webappsec/2006/q3/0182.html
 
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* http://www.webappsec.org/projects/threat/classes/predictable_resource_location.shtml
*Parameter fuzzing and forced browsing – WebAppSec - http://seclists.org/webappsec/2006/q3/0182.html
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* http://cwe.mitre.org/data/definitions/425.html
 
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*http://www.webappsec.org/projects/threat/classes/predictable_resource_location.shtml
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*http://cwe.mitre.org/data/definitions/425.html
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Revision as of 20:21, 13 September 2008

This is an Attack. To view all attacks, please see the Attack Category page.


Last revision: 09/13/2008


ASDR Table of Contents

Contents


Description

Forced browsing is an attack where the aim is to enumerate and access resources that are not referenced by the application, but are still accessible.

An attacker can use Brute Force techniques to search for unlinked contents in the domain directory, such as temporary directories and files, old backup and configuration files. These resources may store sensitive information about web applications and operational systems, such as source code, credentials, internal network addressing, and so on, thus being considered a valuable resource for intruders.

This attack is performed manually when the application index directories and pages are based on number generation or predictable values, or using automated tools for common files and directory names.

This attack is also known as Predictable Resource Location, File Enumeration, Directory Enumeration, and Resource Enumeration.

Risk Factors

TBD


Examples

Example 1

This example presents a technique of Predictable Resource Location attack, which is based on a manual and oriented identification of resources by modifying URL parameters. The user1 wants to check his on-line agenda through the following URL:

 www.site-example.com/users/calendar.php/user1/20070715 

In the URL, it is possible to identify the username (“user1”) and the date (mm/dd/yyyy). If the user attempts to make a forced browsing attack, he could guess another user’s agenda by predicting user identification and date, as follow:

 www.site-example.com/users/calendar.php/user6/20070716 

The attack can be considered successful upon accessing other user's agenda. A bad implementation of the authorization mechanism contributed to this attack's success.

Example 2

This example presents an attack of static directory and file enumeration using an automated tool.

A scanning tool, like | Nikto, has the ability to search for existent files and directories based on a database of well-know resources, such as:

/system/
/password/
/logs/
/admin/
/test/

When the tool receives an “HTTP 200” message it means that such resource was found and should be manually inspected for valuable information.

Related Threat Agents

Related Attacks

Related Vulnerabilities

Related Controls

References