You might harden policy files for Java process to prevent usage of Runtime. Not sure about any attack vectors, but I can execute linux commands. Also interestin

You might harden policy files for Java process to prevent usage of Runtime. Not sure about any attack vectors, but I can execute linux commands. Also interesting that you allowed threads. import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; class Solution { public static void main(String[] args) throws IOException, InterruptedException { final Runtime rt = Runtime.getRuntime(); final Process pr = rt.exec("uname -a"); new Thread(new Runnable() { public void run() { BufferedReader input = new BufferedReader(new InputStreamReader(pr.getInputStream())); String line = null; try { while ((line = input.readLine()) != null) System.out.println(line); } catch (IOException e) { e.printStackTrace(); } } }).start(); pr.waitFor(); } }