JeecgBoot抵御XSS攻击实现方案

zhangdaiscott · 发表于 2022-5-12 11:37:32

1. 问题描述

jeecgboot后台启动后，在浏览器输入地址

http://localhost:8080/jeecg-boot/jmreport/view/')%22οnmοuseοver=alert('hacking')%20%20(

复制代码

弹出对话框

2. 试验环境

jeecgboot 3.0

3. 增加配置类

在jeecg-boot-module-system的config包下，新建xss包，并新增几个类

类的具体代码如下：

package org.jeecg.config.xss;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* Created by sunh on 2012/12/29.
* xss 过滤器只能过滤form表单形式提交的参数
*/
public class XssFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
System.out.println("***********开始过滤");
XssHttpServletRequestWrapper xssRequest =
new XssHttpServletRequestWrapper((HttpServletRequest) servletRequest);
filterChain.doFilter(xssRequest, servletResponse);
}
@Override
public void destroy() {
}
}

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package org.jeecg.config.xss;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
/**
* Created by sunh on 2012/12/29.
* xss 自动配置类
*/
@Configuration
public class XssFilterAtuoConfig {
@Bean
public FilterRegistrationBean xssFiltrRegister() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new XssFilter());
registration.addUrlPatterns("/*");
registration.setName("XssFilter");
registration.setOrder(1);
return registration;
}
@Bean
@Primary
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
SimpleModule module = new SimpleModule();
module.addDeserializer(String.class, new XssStringJsonDeserializer());
ObjectMapper objectMapper = Jackson2ObjectMapperBuilder.json().build();
objectMapper.registerModule(module);
return new MappingJackson2HttpMessageConverter(objectMapper);
}
}

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package org.jeecg.config.xss;
import org.springframework.web.servlet.HandlerMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
/**
* Created by sunh on 2012/12/29.
* xss 包装
*/
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
public XssHttpServletRequestWrapper(HttpServletRequest request) {
super(request);
}
@Override
public String getHeader(String name) {
String value = super.getHeader(name);
return XssUtil.cleanXSS(value);
}
@Override
public String getParameter(String name) {
String value = super.getParameter(name);
return XssUtil.cleanXSS(value);
}
@Override
public String[] getParameterValues(String name) {
String[] values = super.getParameterValues(name);
if (values != null) {
int length = values.length;
String[] escapseValues = new String[length];
for (int i = 0; i < length; i++) {
escapseValues[i] = XssUtil.cleanXSS(values[i]);
}
return escapseValues;
}
return super.getParameterValues(name);
}
/**
* 主要是针对HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE 获取pathvalue的时候把原来的pathvalue经过xss过滤掉
*/
@Override
public Object getAttribute(String name) {
// 获取pathvalue的值
if (HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE.equals(name)) {
Map uriTemplateVars = (Map) super.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
if (Objects.isNull(uriTemplateVars)) {
return uriTemplateVars;
}
Map newMap = new LinkedHashMap<>();
uriTemplateVars.forEach((key, value) -> {
if (value instanceof String) {
newMap.put(key, XssUtil.cleanXSS((String) value));
} else {
newMap.put(key, value);
}
});
return newMap;
} else {
return super.getAttribute(name);
}
}
}

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package org.jeecg.config.xss;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
/**
* Created by sunh on 2012/12/29.
* 创建xss的json转换器
*/
public class XssObjectMapper extends ObjectMapper {
public XssObjectMapper() {
SimpleModule module = new SimpleModule("XSS JsonDeserializer");
module.addDeserializer(String.class, new XssStringJsonDeserializer());
this.registerModule(module);
}
}

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package org.jeecg.config.xss;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import org.springframework.web.util.HtmlUtils;
import java.io.IOException;
/**
* Created by sunh on 2012/12/29.
* 基于xss的JsonDeserializer
*/
public class XssStringJsonDeserializer extends JsonDeserializer<String> {
@Override
public Class<String> handledType() {
return String.class;
}
@Override
public String deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
return HtmlUtils.htmlEscape(jsonParser.getValueAsString());
}
}

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package org.jeecg.config.xss;
import java.util.Objects;
/**
* Created by sunh on 2012/12/29
* xss工具类
*/
public class XssUtil {
public static String cleanXSS(String value) {
if (Objects.isNull(value)) {
return value;
}
//You'll need to remove the spaces from the html entities below
value = value.replaceAll("<", "& lt;").replaceAll(">", "& gt;");
value = value.replaceAll("\\(", "& #40;").replaceAll("\\)", "& #41;");
value = value.replaceAll("'", "& #39;");
value = value.replaceAll("eval\\((.*)\\)", "");
value = value.replaceAll("[\\"\\\'][\\s]*javascript:(.*)[\\"\\\']", """");
value = value.replaceAll("script", "");
return value;
}
}

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4. 测试结果
启动后端，在浏览器访问地址

http://localhost:8080/jeecg-boot/jmreport/view/')%22οnmοuseοver=alert('hacking')%20%20(

复制代码

未弹出对话框
启动前端，原来的服务能正常访问。