vb.org Archive - SQL injection

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- - SQL injection (https://vborg.vbsupport.ru/showthread.php?t=63374)

Jakeman

04-03-2004 01:01 AM

SQL injection

I am testing an external script I wrote. I just discovered that the user can inject code into an UPDATE query through one of the form fields by entering clever values. For example:

UPDATE tablename SET field = '$_POST[var]'

So I need to check that the posted variable is clean. I'm not sure where to start and I want to cover all possibilities. Any hints, tips, advice?

thx

vB3 3.0.0
I don't suppose vB3 has a function for this?

filburt1

04-03-2004 02:37 AM

vB3 has the globalize() function. This works too:

PHP Code:


		
			
foreach ($_REQUEST as $key => $value)

{

    $_REQUEST[$key] = htmlspecialchars_uni($value); // htmlspecialchars() for non-vB pages

}

filburt1

04-03-2004 02:38 AM

Whoops, that's HTML injection...SQL injection is the same, but use addslashes() instead of htmlspecialchars[_uni]().

Jakeman

04-03-2004 04:23 AM

Oh that makes sense... to escape bad characters.

Where is addslashes() defined? I can't find it.

NTLDR

04-03-2004 04:38 PM

addslashes() is a default PHP function :)

http://uk.php.net/addslashes

Jakeman

04-03-2004 10:47 PM

thx

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