漏洞：不安全的http请求方法，tomcat 禁用http method。代码解决

问题描述：通过fiddler，使用raw重现HTTP请求，修改GET为TRACE重新请求。tomcat返回405，head 包含

Allow：POST,GET,DELETE,OPTIONS,PUT,HEAD

解决方法：使用filter进行过滤和处理。

1.修改tomcat的server.xml，允许trace方法：<Connector allowTrace="true"

2.修改web.xml，添加filter

<filter>
    <filter-name>filterUtil</filter-name>
    <filter-class>com.utils.FilterUtil</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>filterUtil</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

3.添加filter类

package com.utils;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class FilterUtil implements Filter {
	Logger log=LoggerFactory.getLogger(this.getClass());
	
	@Override
	public void destroy() {
		
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
			throws IOException, ServletException {
	    HttpServletRequest request = (HttpServletRequest) arg0;
	    HttpServletResponse response = ((HttpServletResponse) arg1); 
		String m=request.getMethod();
		if(!"GET".equals(m)&&!"POST".equals(m)){
			System.out.println("GET or POST only  ");
			response.setHeader("Allow", "GET,POST");
			response.setStatus(405);
			return;
		}
		arg2.doFilter(arg0, arg1);
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}
	
}

 按错误的method请求即可看到效果：