Added brute-force attack prevention via login rate limit (#1490566)

Aleksander Machniak

2015-11-11 a15d877ba8e12ba6659aad69d63b8b73256144ad

 program/include/rcmail.php

@@ -60,6 +60,7 @@
    const ERROR_INVALID_REQUEST  = 1;
    const ERROR_INVALID_HOST     = 2;
    const ERROR_COOKIES_DISABLED = 3;
    const ERROR_RATE_LIMIT       = 4;


    /**
@@ -602,12 +603,22 @@
        // user already registered -> overwrite username
        if ($user = rcube_user::query($username, $host)) {
            $username = $user->data['username'];

            // Brute-force prevention
            if ($user->is_locked()) {
                $this->login_error = self::ERROR_RATE_LIMIT;
                return false;
            }
        }

        $storage = $this->get_storage();

        // try to log in
        if (!$storage->connect($host, $username, $password, $port, $ssl)) {
            if ($user) {
                $user->failed_login();
            }

            // Wait a second to slow down brute-force attacks (#1490549)
            sleep(1);
            return false;