bugtraq - Full Path Disclosure xGuestBook v1.02

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Message-ID: <20060725223525.11870.qmail@securityfocus.com>
Date: 25 Jul 2006 22:35:25 -0000
From: dicomdk@...il.com
To: bugtraq@...urityfocus.com
Subject: Full Path Disclosure xGuestBook v1.02

###################Dicomdk####################
Full Path Disclosure xGuestBook v1.02        #
                                             #
http://xatrix.xa.funpic.de/xguestbook2/      #
                                             #
By : X-boy                                   #
##############################################

http://[HOST]/post.php

Test : http://xatrix.xa.funpic.de/xguestbook2/post.php

Result :
========
Notice: Undefined index: user in [site]\post.php on line 15

Notice: Undefined index: mail in [site]\post.php on line 16

Notice: Undefined index: p in [site]\post.php on line 17

Notice: Undefined index: url in [site]\post.php on line 19

##############################################
Patch :                                      #
##############################################

-Open post.php 
-Find : 

             $user  = HTMLSPECIALCHARS(trim($_POST['user']));
             $email = HTMLSPECIALCHARS(trim($_POST['mail']));
             $post  = nl2br(HTMLSPECIALCHARS($_POST['p']));
             $post  = str_replace("  "," &nbsp;",$post);
             $url   = HTMLSPECIALCHARS(trim($_POST['url']));
             $date  = date("Y-m-d g:i:s");
			 
-Change to :

if (isset($_POST['user']) AND isset($_POST['mail']) AND isset($_POST['p']) AND isset($_POST['url']))
{
             $user  = HTMLSPECIALCHARS(trim($_POST['user']));
             $email = HTMLSPECIALCHARS(trim($_POST['mail']));
             $post  = nl2br(HTMLSPECIALCHARS($_POST['p']));
             $post  = str_replace("  "," &nbsp;",$post);
             $url   = HTMLSPECIALCHARS(trim($_POST['url']));
             $date  = date("Y-m-d g:i:s");
}

##############################################