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www.waraxe.us Forum Index -> Sql injection -> You Can Do SQL Injection Here ?
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You Can Do SQL Injection Here ?
PostPosted: Fri Jun 24, 2005 4:16 pm Reply with quote
Devil-00
Regular user
Regular user
Joined: Apr 27, 2005
Posts: 6
Location: Palestine , Jerusalem




Hi ,,
I Have Fucntion From My Frind ,, Embarassed
We Wanna To Stop SQL Injections ,,
We Can Use This Function To Stop SQL Injections ?

Code:

function SqlStatments ($text)

{

$text = strtolower($text);



$text = str_replace('delete','',$text);

$text = str_replace('truncate','',$text);

$text = str_replace('update','',$text);

$text = str_replace('union','',$text);

$text = str_replace('insert','',$text);

$text = str_replace('select','',$text);



return $text;

}

And About XSS .. We Can Stop Attack By This Function ?
Code:

function Characters ($text)

{

$text = str_replace('<','',$text);

$text = str_replace('>','',$text);

$text = str_replace('%22','',$text);

$text = str_replace('%3C','',$text);

$text = str_replace('%3E','',$text);



return $text;

}


Sorry For My Bad English Embarassed
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PostPosted: Fri Jul 22, 2005 4:00 am Reply with quote
Tirim
Beginner
Beginner
Joined: Jul 22, 2005
Posts: 2




'; UP/**/DATE SomeTable SET Password ='blah' where 1=1--

The above example will evade the sanitization methods you use, because /**/ is treated as a comment, breaking the 'UPDATE' statement into fragements without making the query invalid.

A variable can also be declared as a hex equivilant of an SQL Query and then executed, as in @foobar = 0x73656c65637420404076657273696f6e; exec (@foobar)--.

Having a list of 'badwords' is not the best solution to guard against SQL Injection.

Cheers Cool
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PostPosted: Fri Jul 22, 2005 11:28 am Reply with quote
waraxe
Site admin
Site admin
Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




I can't imagine any practical use of application, where such common words as "delete" and "select" are forbidden. Even "union" - what about European Union? This code will smash up this!
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PostPosted: Fri Jul 22, 2005 9:50 pm Reply with quote
Chb
Valuable expert
Valuable expert
Joined: Jul 23, 2005
Posts: 206
Location: Germany




Hey,

a while ago a friend coded a protection for SQL-Injection. Here it is:
Code:
function sqlprotect($str)
{
return mysql_escape_string($str);
}

I think you know how to use.
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You Can Do SQL Injection Here ?
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