Webfroot Shoutbox 2.32 directory traversal and code injection.

2003-05-30T00:00:00
ID SECURITYVULNS:DOC:4614
Type securityvulns
Reporter Securityvulns
Modified 2003-05-30T00:00:00

Description

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)