CVE-2019-9813

Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.

Affected products

Alt Linux, Centos, Firefox, Firefox Esr, Red Hat, Suse, Thunderbird, Ubuntu

Mozilla Firefox

< 60.6.1, 66.0.1

Mozilla Thunderbird

< 60.6.1

Fix

Available

CVSS 3.0

8.8 HIGH

EPSS

7.4% (94th percentile)

Weakness

CWE-843

NVD status

Modified

Published

2019-04-26