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www.waraxe.us Forum Index -> All other software -> Local *.php file inclusion and full path disclosure in BXCP
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Local *.php file inclusion and full path disclosure in BXCP
PostPosted: Mon May 09, 2005 9:16 pm Reply with quote
FistFucker
Regular user
Regular user
 
Joined: May 06, 2005
Posts: 21




Here is an old advisory for BXCP, a small CMS for clans. I know my fix is scrap, so please update to a higher version and don't use my source code! There are also a few undiscovered SQL injections, full path disclosures and cross site scriptings in this CMS. Maybe I will release a second advisory, or do you it if you are interested and faster than me. ;-)

Code:

Title:   Local *.php file inclusion and full path disclosure in BXCP <= 0.2.9.7
Author:  [OfB|FistFucker]
Contact: http://www.ofb-clan.de/
         #ofb-clan at irc.quakenet.org:6667


 1. Local *.php file inclusion:
---------------------------------

 Because of no user input validation in 'index.php' it's possible to include
 every local *.php file. Let's take a look at the most important part of the
 source code:

  ~~ SOURCE CODE ~~~~~~~~~~~~~~~~~~~~~~~~

   $show = $_REQUEST['show'];
   require ("config.php");

   if (!file_exists("show/$show.php"))
   {
     $notfound = $show;
     $show = 'error';
   }

   $page = "show/$show.php";

  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ END ~~

  Yeah, there is no validation of the variable '$show'. So we can easily access
  every local file ending with '.php', also in restricted directories like
  htaccess. We can easily jump outside the 'show' directory and include every
  file ending with '.php'!

  Example URL: http://www.rz-liga.com/index.php?show=../intern/board/common

  Don't worry about the response "Hacking attempt". It's just a die() message
  from 'common.php' of their htaccess protected phpBB. ;-)


 2. Full path disclosure:
---------------------------

  And by including the 'index.php' into itself with the above vulnerability we
  can cause a full path disclosure.

  Example URL: http://www.rz-liga.com/index.php?show=../index


 3. Let's fix that shit! =)
-----------------------------

  Just replace in 'index.php':

  ~~ SOURCE CODE ~~~~~~~~~~~~~~~~~~~~~~~~

   $show = $_REQUEST['show'];

   if(ereg("\.\.", $show))
   {
     $show = '';
   }

   require ("config.php");

   if (!file_exists("show/$show.php"))
   {
     $notfound = $show;
     $show = 'error';
   }

   $page = "show/$show.php";

  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ END ~~


 4. Greetings:
----------------

  Greetings fly out to all members of OfB-Clan that know me. And sorry for the
  events that occured at and after the 25th December. Please forgive me and
  please stop seeing me as a criminal kiddie. Better see me as a guardian! =D

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