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Fwd: mysql selecting into outfile in an insert
From: Robin Wood <robin () digininja org>
Date: Tue, 20 Jul 2010 22:23:36 +0100

I sent this to the webappsec mailing list but thought I'd send it here
as well looking for some SQL Injection experts.

---------- Forwarded message ----------

I've got a vulnerable web app with a MySQL backend where I can inject
into an INSERT query and I want to create a file. With a SELECT I
would use a UNION and then SELECT whatever INTO OUTFILE "filename" but
how do you do it with an INSERT query?

I tried:

INSERT INTO size VALUES (22, (SELECT "abc" INTO OUTFILE "/tmp/test")) ;

That executes and size gets a new row with 22 and "abc" in it but it
doesn't create the file.

I also tried an UPDATE and had the same problem:

UPDATE size SET big=22 WHERE big =  (SELECT "abc" INTO OUTFILE "/tmp/test");

The update happens where big="abc" but no outfile.

Can it be done?

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