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AIS3 Final CTF Web
<?php
/*
sqlpwn by orange
Don't brute force or you will be banned !
*/
session_start();
error_reporting(0);
include "template.html";
include "config.php";
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
mysql_select_db($dbname);
mysql_query("SET sql_mode='strict_all_tables'");
function check_login(){
if ( !isset($_SESSION['name']) ){
exit('not login');
}
}
function escape($str){
$str = mysql_real_escape_string($str);
return $str;
}
$mode = $_GET['mode'];
if ( $mode == 'admin' ){
check_login();
if ( $_SESSION['admin'] != 1 ){
exit('not admin');
}
include getcwd() . '/' . $_GET['boom'] . "php";
} else if ( $mode == 'post' ){
check_login();
$name = $_SESSION['name'];
$titl = $_POST['title'];
$note = $_POST['note'];
$note = trim(escape($note));
$titl = trim(escape($titl));
if ( strlen($note) < 6 ){
exit('para error');
}
if ( strlen($titl) < 6 ){
exit('para error');
}
if ( strlen($note) > 128 ){
$note = substr($note, 0, 128);
}
if ( strlen($titl) > 32 ){
$titl = substr($titl, 0, 32);
}
mysql_query(sprintf("INSERT INTO notes(name, title, note) VALUES('%s', '%s', '%s')", $name, $titl, $note));
echo 'ok';
} else if ( $mode == 'show' ){
check_login();
$id = (int)$_GET['id'];
$r = mysql_query(sprintf("SELECT * FROM notes WHERE id='%d'", $id));
if ( mysql_num_rows($r) == 0 ){
exit('id not found');
}
$result = mysql_fetch_object($r);
if ( $result->name !== $_SESSION['name'] ){
exit('not posted by you');
}
$name = $_SESSION['name'];
$titl = $result->title;
$note = $result->note;
echo "title " . $titl;
echo "<br>";
echo "note " . $note;
exit();
} else if ( $mode == 'register' ) {
$name = $_POST['name'];
$pass = $_POST['pass'];
$name = trim( escape( $name ) );
$pass = trim( escape( $pass ) );
if ( strlen($name) < 6 ){
exit('para error');
}
if ( strlen($pass) < 6 ){
exit('para error');
}
$r = mysql_query(sprintf("SELECT * FROM users WHERE name='%s'", $name));
if ( mysql_num_rows($r) > 0 ){
exit('duplicated');
}
$sql = sprintf("INSERT INTO users(name, pass) VALUES('%s', '%s')", $name, md5($pass));
mysql_query($sql);
$sql = sprintf("INSERT INTO locks(name) VALUES('%s')", $name);
mysql_query($sql);
echo 'ok';
} else if ( $mode == 'login' ) {
$name = $_POST['name'];
$pass = $_POST['pass'];
$name = trim( escape( $name ) );
$pass = trim( escape( $pass ) );
$r = mysql_query(sprintf("SELECT * FROM users WHERE name='%s'", $name));
if ( mysql_num_rows($r) == 0 ){
exit('user not found');
}
$result = mysql_fetch_object($r);
if ( $result->pass !== md5($pass) ){
exit('pass incorrect');
}
$r = mysql_query(sprintf("SELECT * FROM locks WHERE name='%s'", $name));
if ( mysql_num_rows($r) > 0 ){
exit('user locked');
}
$_SESSION['id'] = $result->id;
$_SESSION['name'] = $result->name;
$_SESSION['pass'] = $result->pass;
if ( $name == 'orange' ){
$_SESSION['admin'] = 1;
}
echo 'ok';
} else if ( $mode == 'info' ){
phpinfo();
} else if ( $mode == 'flag' ){
check_login();
echo $flag;
} else {
// I am always on your top >/////<
$r = mysql_query(sprintf("SELECT * FROM notes WHERE name='orange' UNION SELECT * FROM notes ORDER BY id DESC LIMIT 100"));
while ($row = mysql_fetch_object($r)) {
$id = $row->id;
$titl = $row->title;
echo sprintf("<li><a href='./sqlpwn.php?mode=show&id=%d'>%s</a></li>\n", $id, $titl);
echo "<br>";
}
}
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