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Webfroot Shoutbox 2.32 directory traversal and code injection.
From: pokleyzz <pokleyzz () scan-associates net>
Date: Thu, 29 May 2003 11:52:54 +0800

Products: Webfroot Shoutbox v 2.32 and below (http://shoutbox.sf.net)
Date: 09 May 2003
Author:  pokleyzz <pokleyzz_at_scan-associates.net>
Contributors: sk_at_scan-associates.net shaharil_at_scan-associates.net munir_at_scan-associates.net
URL: http://www.scan-associates.net

Summary: Webfroot Shoutbox 2.32 and below directory traversal and code injection.

Description
===========
Webfroot Shoutbox is PHP script released under the GPL. Also known as a tagboard or a blabbox, shoutboxes allow visitors to your website to leave messages to other visitors quickly and easily.

Details
=======
User can view any readable file on system where webfroot shoutbox is running using
$conf variable.

i) Shoutbox v2.32

shoutbox.php line 43
-------------------------------------------------------------------
if (!isset($conf)) {
  $conf="shoutboxconf.php";
} else {
# michel v was there $conf = str_replace(':', '', $conf); // hi cross-site scripting, bye cross-site scripting
  $conf = str_replace('%3a', '', $conf); // hi cross-site scripting, bye cross-site scripting
}

require_once ($conf);
-------------------------------------------------------------------

ii) Shoutbox v2.31

shoutbox.php line 43
-------------------------------------------------------------------
if (!isset($conf)) {
  $conf="shoutboxconf.php";
}

require_once ($conf);
--------------------------------------------------------------------

Proof of concept
================

a) View any readable file
        http://blablabla.com/shoutbox.php?conf=../../../../../../../etc/passwd

b) Remote command execution
        i)  for version 2.31 user can remotely include file.
        ii) version 2.32 user can use apache access_log to include php code
                [see attachment]
Workaround
==========
Append to line 48 of shoutbox.php
        $conf = str_replace('./', '', $conf); // to avoid directory traversal


Tips
====
Search for ":: Shoutbox" at www.google.com can easily identify vulnerable site (129,000 result)







Attachment: jeritan_batinku.pl
Description:


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  • Webfroot Shoutbox 2.32 directory traversal and code injection. pokleyzz (May 30)
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