HttpOnly的设置

描述：

1.会话cookie中缺少HttpOnly属性会导致攻击者可以通过程序(JS脚本、Applet等)获取到用户的cookie信息，造成用户cookie信息泄露，增加攻击者的跨站脚本攻击威胁。

2.HttpOnly是微软对cookie做的扩展，该值指定cookie是否可通过客户端脚本访问。Microsoft Internet Explorer 版本 6 Service Pack 1 和更高版本支持cookie属性HttpOnly。 

3.如果在Cookie中没有设置HttpOnly属性为true，可能导致Cookie被窃取。窃取的Cookie可以包含标识站点用户的敏感信息，如ASP.NET会话ID或Forms身份验证票证，攻击者可以重播窃取的Cookie，以便伪装成用户或获取敏感信息，进行跨站脚本攻击等。 

4.如果在Cookie中设置HttpOnly属性为true，兼容浏览器接收到HttpOnly cookie，那么客户端通过程序(JS脚本、Applet等)将无法读取到Cookie信息，这将有助于缓解跨站点脚本威胁。

解决方案：

CookieHttpOnlyFilter.java

package org._common.filter;
 
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
 
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.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * 解决检测到会话cookie中缺少HttpOnly属性的问题
 * @author kf0101
 *
 */
public class CookieHttpOnlyFilter implements Filter {
 
 public void destroy() {
 
 }
 
 public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain filterChain) throws IOException, ServletException {
  // TODO Auto-generated method stub
        HttpServletRequest req = (HttpServletRequest) request; 
        HttpServletResponse resp = (HttpServletResponse) response;
  Cookie[] cookies = req.getCookies();
   if(cookies!=null){
    for(Cookie cookie : cookies){
     String value = cookie.getValue(); 
              StringBuilder builder = new StringBuilder(); 
              builder.append("JSESSIONID=" + value + "; "); 
              builder.append("Secure; "); 
              builder.append("HttpOnly; "); 
              Calendar cal = Calendar.getInstance(); 
              cal.add(Calendar.HOUR, 1); 
              Date date = cal.getTime(); 
              Locale locale = Locale.CHINA; 
              SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss",locale); 
              builder.append("Expires=" + sdf.format(date)); 
              resp.setHeader("Set-Cookie", builder.toString());
    }
    filterChain.doFilter(request, response);
   }
 }
 
 public void init(FilterConfig arg0) throws ServletException {
  // TODO Auto-generated method stub
 
 }
}

web.xml：

 
        cookieHttpOnlyFilter 
        org._common.filter.CookieHttpOnlyFilter  
   
 
        cookieHttpOnlyFilter 
        /*  
    

 验证方式：查看浏览器设置（HttpOnly） Set-Cookie:  HttpOnly