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Mozilla Firefox Spidermonkey IonMonkey Spidermonkey Array.prototype.pop Type Confusion

Strike ID:
E19-7o2j1
CVSS:
8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
False Positive:
f
Variants:
1
Year:
2019

Description

This strike exploits a vulnerability in Mozilla Firefox. Specifically, the vulnerability exists in the Javascript engine Spidermonkey. It is possible to craft Javascript in such a way that IonMonkey incorrectly predicts the return type of Array.Prototype.pop. This causes type confusion to occur which can result in remote code execution.

CVE

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-11707

Google

https://code.google.com/p/google-security-research/issues/detail?id=1820