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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2019-07-23T13:24:32

Updated: 2024-08-04T22:01:55.125Z

Reserved: 2019-03-14T00:00:00

Link: CVE-2019-9815

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-07-23T14:15:17.030

Modified: 2024-11-21T04:52:21.973

Link: CVE-2019-9815

cve-icon Redhat

Severity : Important

Publid Date: 2019-05-22T00:00:00Z

Links: CVE-2019-9815 - Bugzilla