{"id":"CVE-2019-9815","details":"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 \u003c 60.7, Firefox \u003c 67, and Firefox ESR \u003c 60.7.","modified":"2026-03-15T14:36:03.189149Z","published":"2019-07-23T14:15:17.030Z","related":["SUSE-SU-2019:1388-1","SUSE-SU-2019:1405-1","SUSE-SU-2019:1458-1","openSUSE-SU-2019:1534-1","openSUSE-SU-2019:1664-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://mdsattacks.com/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-13/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-14/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-15/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1546544"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9815.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"67.0"}]},{"events":[{"introduced":"0"},{"fixed":"60.7"}]},{"events":[{"introduced":"0"},{"fixed":"60.7"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}