Java服務器的安全風險？

Question

我在這里有2個簡單的代碼：

服務器：

package myserver;

import java.io.*;
import java.net.*;

class MyServer {

public static void main(String argv[]) throws Exception {
    String clientSentence;
    String capitalizedSentence;
    ServerSocket welcomeSocket = new ServerSocket(6789);
    while (true) {
        Socket connectionSocket = welcomeSocket.accept();
        BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
        DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
        clientSentence = inFromClient.readLine();
        System.out.println("Received: " + clientSentence);
        capitalizedSentence = clientSentence.toUpperCase() + '\n';
        outToClient.writeBytes(capitalizedSentence);
    }
    }
}

客戶：

package myclient;

import java.lang.*;
import java.io.*;
import java.net.*;
import java.util.Scanner;

class MyClient {

public static void main(String argv[]) throws Exception {
    String sentence;
    String modifiedSentence;
    BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
    Socket clientSocket = new Socket("localhost", 6789);
    DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
    BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
    sentence = inFromUser.readLine();
    outToServer.writeBytes(sentence + '\n');
    modifiedSentence = inFromServer.readLine();
    System.out.println("FROM SERVER: " + modifiedSentence);
    clientSocket.close();
}
}

現在...。如果我向公眾開放此服務器，通過發送修改后的程序包並進入系統會不會有安全隱患？ （服務器使用的是Linux發行版。）還是只能發送簡單的字符串？

Answer 1

這段代碼只會讀取一個字節序列並將其打印出來（並發送響應）。 據我所知，這完全沒有風險。

Answer 2

有人通過發送沒有換行符的大量數據可能使Java進程崩潰。 根據您為JVM提供的內存量，這可能會影響運行該程序的服務器。