Author: Janek Vind "waraxe"
Date: 27. September 2007
Location: Estonia, Tartu
Web: http://www.waraxe.us/advisory-55.html


Target software description:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

http://sitex.bjsintay.com/

SiteX is a versitile web tool that will enable you to start your own
dynamic website in under 5 minutes. Driven by PHP and MySQL, SiteX
consists of components common to most personal and professional websites.


Vulnerabilities: Sql Injection in "search.php"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Let's analyze "search.php" source code:

------------>[source code]<------------

if(isset($_GET['search']))
$search = stripslashes($search);

$search = trim(stripslashes($search));
...
$sxPhotoResults = sxPhotoSearchResults($search);

------------>[/source code]<-----------

As we can see, stripslashes() is used against search string, so that
"magic_quotes" will not help against sql injection. And following function
"sxPhotoSearchResults()" is not sanitizing search string either.

So let's have a test:

http://victim.com/search.php?search=O'Brien

and we get nice error message:

SiteX experienced error #1 with an SQL bash readout of : You have an error
in your SQL syntax; check the manual that corresponds to your MySQL server
version for the right syntax to use near
'Brien%' OR SiteX_Photos.name LIKE '%O'Brien%' OR
SiteX_Photos.description LIKE '' at line 2

Yep, sql injection exists here. Now, some facts about this injection:

1. This seems to be exploitable only as blind sql injection. I have written
proof-of-concept exploit for this and it is working as expected.
2. "magic_quotes" does not matter, because "stripslashes()" is used.
3. "register_globals" is not important either, because attack comes from "$_GET".


Greetings:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Greets to ToXiC, LINUX, y3dips, Sm0ke, Heintz, slimjim100, Chb
and all other people who know me!
Greetings to Raido Kerna.
Tervitusi Torufoorumi rahvale!

Contact:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

come2waraxe@yahoo.com
Janek Vind "waraxe"

Homepage: http://www.waraxe.us/

Copyright © by Waraxe IT Security Portal All Right Reserved.

Published on: 2007-09-27 (14473 reads)