Not rated
CVE-2019-9815 If hyperthreading is not disabled, a timing attack vulnerability exists, similar to previous Spectre attacks
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 60.7 | earliest → < 60.7 | 60.7 |
| Firefox 67 | earliest → < 67 | 67 |
| Firefox ESR 60.7 | earliest → < 60.7 | 60.7 |
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