{"id":"CVE-2019-9815","state":"PUBLISHED","title":"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 hyperthreadi","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.","publishedAt":"2019-07-23T13:24:32.000Z","updatedAt":"2024-08-04T22:01:55.125Z","severity":null,"assigner":"mozilla","products":["Mozilla Thunderbird","Mozilla Firefox","Mozilla Firefox ESR"],"affected":[{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"unspecified","status":"affected","lessThan":"60.7","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"67","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"60.7","versionType":"custom"}]}],"references":["https://www.mozilla.org/security/advisories/mfsa2019-13/","https://www.mozilla.org/security/advisories/mfsa2019-15/","https://www.mozilla.org/security/advisories/mfsa2019-14/","https://bugzilla.mozilla.org/show_bug.cgi?id=1546544","https://mdsattacks.com/"],"weaknesses":[],"ingestedAt":"2026-10-29T19:46:15.253Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/9xxx/CVE-2019-9815.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2019-9815","state":"PUBLISHED","datePublished":"2019-07-23T13:24:32.000Z","dateUpdated":"2024-08-04T22:01:55.125Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2019-03-14T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"If hyperthreading is not disabled, a timing attack vulnerability exists, similar to previous Spectre attacks. 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