JAVAWEB项目解决xss漏洞攻击

由于公司安全部门扫描公司上线网站发现了跨脚本传输漏洞,因此派我修复,特把修复心得记录下来

首先,什么是xss?xss攻击全称跨站脚本攻击,就比如< IMG SRC="javascri pt:alert('XSS');" >;可以在参数中加入js代码。

解决方案:

1、采用esapi通过入参校验过滤,这种方案是最安全的,也是最麻烦的。

2、采用过滤器的方法在获取参数的时候对入参进行特殊字符格式化。我采用的就是这种方法。

下面讲解一下 步骤

一:添加xssfilter类  XSSAttackInterceptor.java

public class XSSAttackInterceptor implements Filter {

    private static final long serialVersionUID = 7427725804042693717L;

    private Logger logger = Logger.getLogger(XSSAttackInterceptor.class);

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

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        XssHttpServletRequestWrapper xssRequest = new XssHttpServletRequestWrapper((HttpServletRequest) request);
        filterChain.doFilter(xssRequest, response);
    }

    @Override
    public void destroy() {

    }

第二步:添加XssHttpServletRequestWrapper.java

public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
    public XssHttpServletRequestWrapper(HttpServletRequest servletRequest) {
        super(servletRequest);
    }

    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] = cleanXSS(values[i]);
        }
        return encodedValues;
    }

    public String getParameter(String parameter) {
        String value = super.getParameter(parameter);
        if (value == null) {
            return null;
        }
        return cleanXSS(value);
    }

    public String getQueryString() {
        String value = super.getQueryString();
        if (value == null) {
            return null;
        }
        return cleanXSS(value);
    }

    public String getHeader(String name) {
        String value = super.getHeader(name);
        if (value == null)
            return null;
        return cleanXSS(value);
    }

    private String cleanXSS(String value) {
        if (StringUtils.isNotBlank(value)) {
            //删除script标签
            Pattern compile = Pattern.compile("", Pattern.CASE_INSENSITIVE);
            value = compile.matcher(value).replaceAll("");
            compile = Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = compile.matcher(value).replaceAll("");
            compile = Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = compile.matcher(value).replaceAll("");
            // 删除单个的  标签
            compile = Pattern.compile("", Pattern.CASE_INSENSITIVE);
            value = compile.matcher(value).replaceAll("");
            // 删除单个的
                    
                    

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