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IT Security and Insecurity Portal |
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You Can Do SQL Injection Here ? |
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 Posted: Fri Jun 24, 2005 4:16 pm |
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| Devil-00 |
| Regular user |
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| Joined: Apr 27, 2005 |
| Posts: 6 |
| Location: Palestine , Jerusalem |
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Hi ,,
I Have Fucntion From My Frind ,, 
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 $text;
}
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And About XSS .. We Can Stop Attack By This Function ?
| Code: |
function Characters ($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 $text;
}
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Sorry For My Bad English |
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| Posted: Fri Jul 22, 2005 4:00 am |
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| Tirim |
| Beginner |
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| Joined: Jul 22, 2005 |
| Posts: 2 |
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'; UP/**/DATE SomeTable SET Password ='blah' where 1=1--
The above example will evade the sanitization methods you use, because /**/ is treated as a comment, breaking the 'UPDATE' statement into fragements without making the query invalid.
A variable can also be declared as a hex equivilant of an SQL Query and then executed, as in @foobar = 0x73656c65637420404076657273696f6e; exec (@foobar)--.
Having a list of 'badwords' is not the best solution to guard against SQL Injection.
Cheers  |
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| Posted: Fri Jul 22, 2005 11:28 am |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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| I can't imagine any practical use of application, where such common words as "delete" and "select" are forbidden. Even "union" - what about European Union? This code will smash up this! |
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| Posted: Fri Jul 22, 2005 9:50 pm |
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| Chb |
| Valuable expert |
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| Joined: Jul 23, 2005 |
| Posts: 206 |
| Location: Germany |
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Hey,
a while ago a friend coded a protection for SQL-Injection. Here it is:
| Code: | function sqlprotect($str)
{
return mysql_escape_string($str);
} |
I think you know how to use. |
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