360[警告]跨站脚本攻击漏洞/java web利用Filter防止XSS/Spring MVC防止XSS攻击

时间  2019-11-29
标签 警告 脚本 攻击 漏洞 java web 利用 filter 防止 xss spring mvc 栏目 系统网络 繁體版
原文   原文链接

就以这张图片做为开篇和问题引入吧javascript

     <options>问题解决办法请参考上一篇php

  如何获取360站长邀请码，360网站安全站长邀请码html

     首先360可以提供一个这样平台去检测仍是不错的。可是当体检出来 看到漏洞报告，觉得360会像windows上360安全卫士同样帮咱们打好补丁。可是实际发现漏洞是要本身修复,而且php和asp aspx有360提供的补丁或者解决方案（想要看这些方案以前要申请为站长可是须要邀请码 这个能够在页面 页面左下角 360主机卫士感恩卡里面领取）。java

   进入修复方案后发现java几乎没有提供一些建议，只能本身处理。开始使用搜索引擎搜索 java防止xss攻击代码。linux

http://www.yihaomen.com/article/java/409.htmweb

查到了这个方案spring

. 能够采用spring 里面提供的工具类来实现.

   一， 第一种方法。shell

public class XSSFilter implements Filter {

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

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {
        chain.doFilter(new XSSRequestWrapper((HttpServletRequest) request), response);
    }

}

再实现 ServletRequest 的包装类windows

import java.util.regex.Pattern;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

public class XSSRequestWrapper extends HttpServletRequestWrapper {

    public XSSRequestWrapper(HttpServletRequest servletRequest) {
        super(servletRequest);
    }

    @Override
    public String[] getParameterValues(String parameter) {
        String[] values = super.getParameterValues(parameter);

        if (values == null) {
            return null;
        }

        int count = values.length;
        String[] encodedValues = new String[count];
        for (int i = 0; i < count; i++) {
            encodedValues[i] = stripXSS(values[i]);
        }

        return encodedValues;
    }

    @Override
    public String getParameter(String parameter) {
        String value = super.getParameter(parameter);

        return stripXSS(value);
    }

    @Override
    public String getHeader(String name) {
        String value = super.getHeader(name);
        return stripXSS(value);
    }

    private String stripXSS(String value) {
        if (value != null) {
            // NOTE: It's highly recommended to use the ESAPI library and uncomment the following line to
            // avoid encoded attacks.
            // value = ESAPI.encoder().canonicalize(value);

            // Avoid null characters
            value = value.replaceAll("", "");

            // Avoid anything between script tags
            Pattern scriptPattern = Pattern.compile("<script>(.*?)</script>", Pattern.CASE_INSENSITIVE);
            value = scriptPattern.matcher(value).replaceAll("");

            // Avoid anything in a src='...' type of e­xpression
            scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");

            scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");

            // Remove any lonesome </script> tag
            scriptPattern = Pattern.compile("</script>", Pattern.CASE_INSENSITIVE);
            value = scriptPattern.matcher(value).replaceAll("");

            // Remove any lonesome <script ...> tag
            scriptPattern = Pattern.compile("<script(.*?)>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");

            // Avoid eval(...) e­xpressions
            scriptPattern = Pattern.compile("eval\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");

            // Avoid e­xpression(...) e­xpressions
            scriptPattern = Pattern.compile("e­xpression\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");

            // Avoid javascript:... e­xpressions
            scriptPattern = Pattern.compile("javascript:", Pattern.CASE_INSENSITIVE);
            value = scriptPattern.matcher(value).replaceAll("");

            // Avoid vbscript:... e­xpressions
            scriptPattern = Pattern.compile("vbscript:", Pattern.CASE_INSENSITIVE);
            value = scriptPattern.matcher(value).replaceAll("");

            // Avoid onload= e­xpressions
            scriptPattern = Pattern.compile("onload(.*?)=", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");
        }
        return value;
    }
}

还须要到web.xml里面配置安全

<filter>
    <filter-name>XSSFilter</filter-name>
    <filter-class>com.shanheyongmu.XSSFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>XSSFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

放上去以后 出现了 Java.lang.UnsupportedClassVersionError仍是classnotfound 项目跑起来就是首页404。 而后考虑了下linux环境是jdk 1.6而编译的都是maven3.3.0之后版本以及使用的jdk 1.7 版本问题（版本切换步骤能够参考【maven学习总结】里面的execption ,版本以前工做中遇到过因此有印象） 从新换jdk和eclipse设置jdk都是1.6以后编译。不报错了shell上，可是用360快速检测我已修复，仍是存在漏洞。因而继续百度

http://www.what21.com/programming/java/javaweb-summary/xss3.html 发现了不一样的XssFilter写法，尝试以后仍是失败。

https://my.oschina.net/wanglu/blog/267069   Springmvc安全  ，尝试以后失败，固然有些人视图解析器不一样 无加spring 的form标签 没法尝试。

http://www.cnblogs.com/Mainz/archive/2012/11/01/2749874.html  来到了本篇 本篇有3种解决方法

第二种方法

web.xml加上：

       <context-param>
 <param-name>defaultHtmlEscape</param-name>
 <param-value>true</param-value>
 </context-param>

Forms加上：不少人对forms究竟是哪里不理解你能够 加在<form>标签以前 或者body以前

<spring:htmlEscape defaultHtmlEscape="true" />
由于是线上项目因此没法采用如下标签 https://my.oschina.net/wanglu/blog/267069
也就是spring的标签 
<form:input path="someFormField" htmlEscape="true" />

可是<spring:htmlEscape defaultHtmlEscape="true" />在jsp视图解析中仍是能够的，而且这个添加方法 能够不改变原有项目。

所有部署完成后，遗憾的是仍是体检有原有漏洞。

 

从这篇获得了答案 而且修复了 http://huangpengpeng.iteye.com/blog/2091798

 <!--@分隔 -->  
    <filter>  
        <filter-name>xssFilter</filter-name>  
        <filter-class>com.yoro.core.web.XssFilter</filter-class>  
        <init-param>  
            <param-name>SplitChar</param-name>  
            <param-value>@</param-value>  
        </init-param>  
        <init-param>  
            <param-name>FilterChar</param-name>  
            <param-value>>@&lt;@\'@\"@\\@#@(@)</param-value>  
        </init-param>  
        <init-param>  
            <param-name>ReplaceChar</param-name>  
            <param-value>＞'@＜@‘@“@＼@＃@（@）</param-value>  
        </init-param>  
    </filter>  
      
 <filter-mapping>  
    
        <filter-name>xssFilter</filter-name>  
          
  <url-pattern>/*</url-pattern>  
   
    </filter-mapping>  
package com.yoro.core.web;  
  
/** 
 * @author zoro 
 */  
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;  
  
public class XssFilter implements Filter {  
      
    private String filterChar;  
    private String replaceChar;  
    private String splitChar;  
    FilterConfig filterConfig = null;  
    public void init(FilterConfig filterConfig) throws ServletException {  
        this.filterChar=filterConfig.getInitParameter("FilterChar");  
        this.replaceChar=filterConfig.getInitParameter("ReplaceChar");  
        this.splitChar=filterConfig.getInitParameter("SplitChar");  
        this.filterConfig = filterConfig;  
    }  
  
    public void destroy() {  
        this.filterConfig = null;  
    }  
  
    public void doFilter(ServletRequest request, ServletResponse response,  
  
    FilterChain chain) throws IOException, ServletException {  
        chain.doFilter(new XssHttpServletRequestWrapper((HttpServletRequest) request,filterChar,replaceChar,splitChar), response);  
    }  
}  
package com.yoro.core.web;  
  
  
  
import java.io.UnsupportedEncodingException;  
import java.net.URLDecoder;  
  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletRequestWrapper;  
  
  
/** 
 * @author zoro 
 */  
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {  
    private String[]filterChars;  
    private String[]replaceChars;  
    public XssHttpServletRequestWrapper(HttpServletRequest request,String filterChar,String replaceChar,String splitChar) {  
        super(request);  
        if(filterChar!=null&&filterChar.length()>0){  
            filterChars=filterChar.split(splitChar);  
        }  
        if(replaceChar!=null&&replaceChar.length()>0){  
            replaceChars=replaceChar.split(splitChar);  
        }  
    }  
    public String getQueryString() {  
        String value = super.getQueryString();  
        if (value != null) {  
            value = xssEncode(value);  
        }  
        return value;  
    }  
      
    /** 
     * 覆盖getParameter方法，将参数名和参数值都作xss过滤。<br/> 
     * 若是须要得到原始的值，则经过super.getParameterValues(name)来获取<br/> 
     * getParameterNames,getParameterValues和getParameterMap也可能须要覆盖 
     */  
    public String getParameter(String name) {  
        String value = super.getParameter(xssEncode(name));  
        if (value != null) {  
            value = xssEncode(value);  
        }  
        return value;  
    }  
      
    public String[] getParameterValues(String name) {  
        String[]parameters=super.getParameterValues(name);  
        if (parameters==null||parameters.length == 0) {  
            return null;  
        }  
        for (int i = 0; i < parameters.length; i++) {  
            parameters[i] = xssEncode(parameters[i]);  
        }  
        return parameters;  
    }  
      
    /** 
     * 覆盖getHeader方法，将参数名和参数值都作xss过滤。<br/> 
     * 若是须要得到原始的值，则经过super.getHeaders(name)来获取<br/> getHeaderNames 也可能须要覆盖 
     */  
    public String getHeader(String name) {  
  
        String value = super.getHeader(xssEncode(name));  
        if (value != null) {  
            value = xssEncode(value);  
        }  
        return value;  
    }  
      
    /** 
     * 将容易引发xss漏洞的半角字符直接替换成全角字符 
     *  
     * @param s 
     * @return 
     */  
    private  String xssEncode(String s) {  
        if (s == null || s.equals("")) {  
            return s;  
        }  
        try {  
            s = URLDecoder.decode(s, "UTF-8");  
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        }  
        for (int i = 0; i < filterChars.length; i++) {  
            if(s.contains(filterChars[i])){  
                s=s.replace(filterChars[i], replaceChars[i]);  
            }  
        }  
        return s;  
    }  
}

因为尝试较多，也比较混乱，也不肯定哪一个适用各位的状况，只能多查多参考。

此处再补充一个 其余防止Xss攻击代码写法 http://www.what21.com/programming/java/javaweb-summary/xss3.html。

 

后来搜索到了 http://www.cnblogs.com/wangdaijun/p/5652864.html Antisamy项目实现防XSS攻击

遗憾的是配置文件很难找 我在csdn找到了antisamy.xml，你们能够基于搜索关键字 Antisamy项目实现防XSS攻击多查查 。

小弟技术菜，而且思惟通常，求大神勿喷，给予指导和共同交流进步仍是能够的。

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