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www.waraxe.us Forum Index -> Sql injection -> Help on SQL injection
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Help on SQL injection
PostPosted: Sat Jun 26, 2010 2:09 am Reply with quote
rajeshgopinath
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Joined: Jun 26, 2010
Posts: 1




Hi. I am testing an application on which the developer has implemented a code to prevent SQL injection. In his code he looks for a single quote in the input and adds another single quote.

However an input followed by this value %00' (inputvalue%00') on a search box generates an error message which looks like this:

Error [code]: 200 [Message]: SQL Error update tablename set ID1=123, ID2='text1', value='inputvalue''' where ID1=345
ORA-01756 - quoted string not properly terminated


How can I proceed further?

Thanks,
Rajesh
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PostPosted: Sat Jun 26, 2010 9:48 am Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




It seems, that %00 is working as commenting out the tail part of sql query.
But I don't have right now good ideas about how to close that single quoted string, which causes syntax error.
Anyway, you can suggest developer to handle null bytes with caution and filter them out or quote them before use.
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Help on SQL injection
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