一个phper 防备xss攻击的基本手段

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Release: 2016-06-13 11:38:05
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一个phper 预防xss攻击的基本手段

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xss的本质 html注入 

xxs  cross site script

1,反射性xss  No-persistent XXS

2,存储型xxs   persisitent XXS

3,Dom Based XSS   改变dom节点

参加的xss payload  发起cookie劫持伪造post get

phper 我们可以做得基本防御

1,绝大部分浏览器紧张js 访问HttpOnly 属性的cookie

如:

<?phpheader ("set-cookie:cookie1=test1");header("set-cookie:cookie1=test1;httponly",false);?><script>alert(document.cookie);</script>
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只会 显示 cookie=test1

对于php5 setcookie("abc","test",null,null.null,null.null,TURE);//最后一个参数


2,检查输入,检查输出(富文本编辑器)

用htmltntities() ,htmlspecialchars()处理 !

对于输入多使用白名单原则来做判断

同时在js代码中用  JavascriptEncode做转码处理





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