Request Parameter to Action Object Mapping Plugin for Insecure Direct Object References

Name	JSP Parameter to Action Object Mapping (Security) Plugin
Publisher	Datta kudale
License	Apache Software Foundation (ASF)
Version	0.1-ALPHA
Compatibility	Struts 2.0.2+
Homepage	http://code.google.com/p/request-parameter-plugin-for-insecure-direct-object-reference/
Download	http://code.google.com/p/request-parameter-plugin-for-insecure-direct-object-reference/downloads/list

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Overview

JSP Parameter to Action Object Mapping (Security) Plugin does this great thing. Here is also a short overview of what it does and why a developer would want to use it.

Many applications expose their internal object references to users. Attackers use parameter tampering to change references and violate the intended but unenforced access control policy. Frequently, these references point to file systems and databases, but any exposed application construct could be vulnerable.

The best protection is to avoid exposing direct object references to users by using an index, indirect reference map, or other indirect method that is easy to validate. If a direct object reference must be used, ensure that the user is authorized before using it.

Avoid exposing your private object references to users whenever possible, such as primary keys or filenames
Validate any private object references extensively with an "accept known good" approach
Verify authorization to all referenced objects

So to avoid internal object implementation to end user, this plugin can be used.

Threat Agents	Attack Vectors	Security Weakness	Technical Impacts	Business Impacts
______	Exploitability EASY	Prevalence COMMON Detectability EASY	Impact MODERATE	______
Consider the types of users of your system. Do any users have only partial access to certain types of system data?	Attacker, who is an authorized system user, simply changes a parameter value that directly refers to a system object to another object the user isn’t authorized for. Is access granted?	Applications frequently use the actual name or key of an object when generating web pages. Applications don’t always verify the user is authorized for the target object. This results in an insecure direct object reference flaw. Testers can easily manipulate parameter values to detect such flaws and code analysis quickly shows whether authorization is properly verified.	Such flaws can compromise all the data that can be referenced by the parameter. Unless the name space is sparse, it’s easy for an attacker to access all available data of that type.	Consider the business value of the exposed data. Also consider the business impact of public exposure of the vulnerability.

Features

Web Security constraint handled in this plugin for Direct Object reference attack

Single HTML request parameter can be set in Action Object in multiple sub class object

Usage

Instructions how to use your plugin.

Example

This is a quick example of JSP Parameter to Action Object Mapping Plugin in action

You could also include screenshots by attaching the images to this page

Settings

The following settings can be customized. See the developer guide.

Setting	Description	Default	Possible Values

Installation

This plugin can be installed by copying the plugin jar into your application's /WEB-INF/lib directory. No other files need to be copied or created.

Add new xml file in current Action class with filename like
"<ActionName>-jspObjectMapping.xml"

XML File format given below
```
       *DTD format*
```

<?xml version="1.0" encoding="UTF-8"?>
<\!DOCTYPE mapping \[
<\!ELEMENT mapping    (requestParameter)>
<\!ELEMENT requestParameter      (objectMapping)>
<\!ELEMENT objectMapping    (property)>
<\!ELEMENT property (#PCDATA)>
\]>

```
       *XML Format*
```

<?xml version="1.0" encoding="UTF-8"?>
<mapping>
<requestParameter name="userName">
<objectMapping>
<property>user.userName</property>
</objectMapping>
</requestParameter>
<requestParameter name="password">
<objectMapping>
<property>user.password</property>
</objectMapping>
</requestParameter>
</mapping>

Extends package with name "jsp-parameter-object-mapping"

Add interceptor on interceptor stack
<interceptor-ref name="parameterToActionObjectMapping" />

Resources

Links to any other documentation or related products

http://www.owasp.org/index.php/Top_10_2010-A4-Insecure_Direct_Object_References

Version History

Version	Date	Author	Notes
1.0	Dec 20, 2006	Datta kudale	Initial release

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