sqli-labs————Less-55

Less -55

源代码：

Welcome    Dhakkan 



You have reset the Challenge
\n";
		echo "Redirecting you to main challenge page..........\n";
		header( "refresh:4;url=../sql-connections/setup-db-challenge.php?id=$pag" );
		//echo "cookie expired";
			
	}
	else
	{
		// Checking the cookie on the page and populate the table with random value.
		if(isset($_COOKIE['challenge']))
		{
			$sessid=$_COOKIE['challenge'];
			//echo "Cookie value: ".$sessid;
		}
		else
		{
			$expire = time()+60*60*24*30;
			$hash = data($table,$col);
			setcookie("challenge", $hash, $expire);
			
		}
	
		echo "
\n";
	
		// take the variables
		if(isset($_GET['id']))
		{
			$id=$_GET['id'];
	
			//logging the connection parameters to a file for analysis.
			$fp=fopen('result.txt','a');
			fwrite($fp,'ID:'.$id."\n");
			fclose($fp);
	
			
			//update the counter in database
			next_tryy();
			
			//Display attempts on screen.
			$tryyy = view_attempts();
			echo "You have made : ". $tryyy ." of $times attempts";
			echo "


\n";
		
			
			//Reset the Database if you exceed allowed attempts.
			
			if($tryyy >=($times+1))
			{
				setcookie('challenge', ' ', time() - 3600000);
				echo "You have exceeded maximum allowed attempts, Hence Challenge Has Been Reset 
\n";
				echo "Redirecting you to challenge page..........\n";
				echo "
\n";
				header( "refresh:4;url=../sql-connections/setup-db-challenge.php?id=$pag" );
			}		
		
			// Querry DB to get the correct output
			$sql="SELECT * FROM security.users WHERE id=($id) LIMIT 0,1";
			$result=mysql_query($sql);
			$row = mysql_fetch_array($result);

			if($row)
			{
				echo '';	
				echo 'Your Login name:'. $row['username'];
				echo "
";
				echo 'Your Password:' .$row['password'];
				echo "";
				
			}
			else 
			{
				echo '';
//				print_r(mysql_error());
				echo "";  
			}
		}
		else
		{
			echo "Please input the ID as parameter with numeric value as done in  Lab excercises\n

\n";
			echo "The objective of this challenge is to dump the (secret key) from only random table from Database ('CHALLENGES') in Less than $times attempts
";
			echo "For fun, with every reset, the challenge spawns random table name, column name, table data. Keeping it fresh at all times.
" ;
		}
	
	}
?>
 











Submit Secret Key: 

 


';
	$key = addslashes($_POST['key']);
	$key = mysql_real_escape_string($key);
	//echo $key;
	//Query table to verify your result
	$sql="SELECT 1 FROM $table WHERE $col1= '$key'";
	//echo "$sql";
	$result=mysql_query($sql)or die("error in submittion of Key Solution".mysql_error());
	 
	$row = mysql_fetch_array($result);
	
	if($row)
	{
		echo '';
		echo "\n


";
		echo '';
		echo ""; 
		header( "refresh:4;url=../sql-connections/setup-db-challenge.php?id=$pag" );	
	}
	else 
	{
		echo '';
		echo "\n


";
		echo '';
		header( "refresh:3;url=index.php" );
		//print_r(mysql_error());
		echo "";  
			}	
}

?>



 

sql执行语句：

$sql="SELECT * FROM security.users WHERE id=($id) LIMIT 0,1";

根据该sql语句与之前的理论基础，我们直接给出payload：

后续的过程不再多说了，读者自我构建，在上一节已经演示了一波了哈！