Security Advisory

CVE-2019-9815

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2019-07-23 13:24:32

Last updated 2024-08-04 22:01:55

Assigner mozilla

State PUBLISHED

Description

If hyperthreading is not disabled, a timing attack vulnerability exists, similar to previous Spectre attacks. Apple has shipped macOS 10.14.5 with an option to disable hyperthreading in applications running untrusted code in a thread through a new sysctl. Firefox now makes use of it on the main thread and any worker threads. *Note: users need to update to macOS 10.14.5 in order to take advantage of this change.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

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