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www.waraxe.us Forum Index -> Sql injection -> UNION SELECT possible?
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UNION SELECT possible?
PostPosted: Tue May 25, 2010 11:58 am Reply with quote
tommy
Beginner
Beginner
 
Joined: May 25, 2010
Posts: 2




Hi there,

I discovered an exploitable site.

The URL looks like this: http://www.site.com/list.php?search=asdf

This query gets executed:
SELECT * FROM sometable WHERE somecolumn LIKE '%asdf%';

I tried to use a UNION SELECT (I know the column-count of "sometable"), but the PHP script splits the input by commas (probably using explode() ).

So if I enter search=a,b,c, this query is executed:

SELECT * FROM sometable WHERE somecolumn LIKE '%a%' AND somecolumn LIKE '%b%' AND somecolumn LIKE '%c%';

Can anybody please help me how to use a UNION SELECT here?

Thanks in advance,

tommy
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PostPosted: Tue May 25, 2010 8:01 pm Reply with quote
waraxe
Site admin
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




Seems to be complicated case. You can:

1. try to search other sql injections in same website
2. use subselects and blind injection, so that instead of

Code:
zzz' UNION ALL SELECT 1,2,3 4,5


use something like:

Code:
commonword' AND(SELECT COUNT(*)FROM members)>1#


In case of "true" search will return some result, in other case no results.
Basically you will have communication channel with database with bandwith 1 bit per http request Smile
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UNION SELECT possible?
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