AppScan安全漏洞解决

1、跨站脚本

（1）过滤特殊字符

此处不做代码展示比较简单，可以跳转错误页面，也可以用StringEscapeUtils工具类转义，也可以转换半角字符为全角字符，如果有富文本建议后两种

（2）移除js关键字

package cn.com.zhulong.common.web.filter;


import java.io.IOException;
import java.util.regex.Pattern;

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.HttpServletRequestWrapper;

/**
 * 跨站脚本攻击过滤器
 *
 * @author dengfl
 *
 */
public class XSSFilter implements Filter{

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

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

    @Override
    public void destroy() {}
    
    public class XSSRequestWrapper extends HttpServletRequestWrapper {

        public XSSRequestWrapper(HttpServletRequest request) {
            super(request);
        }
        
        @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);
                
                //不验证img格式
                String img="";   
                java.util.regex.Matcher m_image;  
                String regEx_img = "<img.*src\\s*=\\s*(.*?)[^>]*?>"; 
                scriptPattern = Pattern.compile 
                        (regEx_img,Pattern.CASE_INSENSITIVE);   
                m_image = scriptPattern.matcher(value); 
                while(m_image.find()){   
                     img = img + "," + m_image.group();   
                    // Matcher m  = Pattern.compile("src=\"?(.*?)(\"|>|\\s+)").matcher(img); //匹配src
    
                    java.util.regex.Matcher m  = Pattern.compile("src\\s*=\\s*\"?(.*?)(\"|>|\\s+)").matcher(img);
    
                    while(m.find()){
                        return value;
                    }
                }  
                
                
                value = scriptPattern.matcher(value).replaceAll("");
                
                // Avoid anything in a src="http://www.yihaomen.com/article/java/..." 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("");
                // 
                scriptPattern = Pattern.compile("onMouseOver(.*?)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
                value = scriptPattern.matcher(value).replaceAll("");
                //
                scriptPattern = Pattern.compile("onerror(.*?)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
                value = scriptPattern.matcher(value).replaceAll("");
                //
                scriptPattern = Pattern.compile("onclick(.*?)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
                value = scriptPattern.matcher(value).replaceAll("");
                //
                scriptPattern = Pattern.compile("iframe(.*?)", 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;
        }
    }
}

View Code

2、已解密的登录请求

（1）安装ssl证书

（2）对数据进行加密

我采用的是直接在页面提交的时候对密码进行md5加密，传到后台

md5.js代码：

/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

/*
 * These functions implement the four basic operations the algorithm uses.
 */
function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Calculate the HMAC-MD5, of a key and some data
 */
function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left.
 */
function bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert a string to an array of little-endian words
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
 */
function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

/*
 * Convert an array of little-endian words to a string
 */
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

/*
 * Convert an array of little-endian words to a hex string.
 */
function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of little-endian words to a base-64 string
 */
function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}

View Code

提交：

    function submitForm(){
        var password = $("#password").val();
        $("#password").val(hex_md5(password));
        $("#fm1").submit();
    }

View Code

3、启动了不安全的http方法

web.xml中添加如下

     <security-constraint>

            <web-resource-collection>

                <web-resource-name>fortune</web-resource-name>

                <url-pattern>/*</url-pattern>

                <http-method>PUT</http-method>

                <http-method>DELETE</http-method>

                <http-method>HEAD</http-method>

                <http-method>OPTIONS</http-method>

                <http-method>TRACE</http-method>

            </web-resource-collection>

            <auth-constraint></auth-constraint>

        </security-constraint>

View Code

放在项目的web.xml或者tomcat的web.xml都可以

4、Missing "Content-Security-Policy" header 　Missing "X-Content-Type-Options" header Missing "X-XSS-Protection" header

缺少这三个东西，添加过滤器：

package cn.com.zhulong.common.web.filter;

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;

public class FrameFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        
        //允许在 frame 内显示来自同一网站的页面，禁止显示来自其他网站的页面
        res.setHeader("x-frame-options", "SAMEORIGIN");
        //如果从 script 或 stylesheet 读入的文件的 MIME 类型与指定 MIME 类型不匹配，不允许读取该文件。用于防止 XSS 等跨站脚本攻击。
        res.setHeader("X-Content-Type-Options", "nosniff");
        //用于启用浏览器的 XSS 过滤功能，以防止 XSS 跨站脚本攻击。0 禁用 XSS 过滤功能 1 启用 XSS 过滤功能
        res.setHeader("X-XSS-Protection", "1; mode=block");
        //res.setHeader("Content-Security-Policy", "script-src 'self' http://localhost:8050/ayggfwpt-home-web/");
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub
        
    }
    
}

View Code

5、自动填写未对密码字段禁用的html属性

input添加autocomplete="off"属性即可

6、csrf跨站域脚本攻击

添加过滤器验证refer：

package cn.com.zhulong.common.web.filter;

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;
/**
 * 跨站域请求伪造过滤
 * 
 * @author zhouhao
 * @date 2019年1月28日 上午10:45:52
 */
public class CSRFFilter implements Filter{

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        HttpServletRequest req= (HttpServletRequest) request;
        HttpServletResponse res=(HttpServletResponse)response;
        String referer = req.getHeader("referer");
        StringBuffer stringBuffer = new StringBuffer();
        stringBuffer.append(request.getScheme()).append("://").append(request.getServerName());
        if(referer != null && !referer.equals("") ){ 
            if(referer.lastIndexOf(String.valueOf(stringBuffer)) != 0){      
                res.sendRedirect("/toSqlFilter");
                return; //验证失败            
            }else {
                chain.doFilter(request,response);
            }
        }else {
            chain.doFilter(request,response);
        }
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub
        
    }

}

View Code

或者在用户登录之后生成token，将token传到页面上同时放入session或缓存中，页面发送ajax请求或者提交表单的时候讲页面的token传到后台，与session或缓存的token比较，相同则通过，但此方法比较麻烦，所以只用验证refer的方式

posted @ 2019-01-22 16:44 昊Zz 阅读(554) 评论(0) 编辑收藏举报

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AppScan安全漏洞解决

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