CVE-2019-9815

EPSS 1.8%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 1.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

23 Jul 2019Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Mozilla · Firefox Mozilla · Firefox ESR Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1546544 https://mdsattacks.com/https://www.mozilla.org/security/advisories/mfsa2019-13/https://www.mozilla.org/security/advisories/mfsa2019-14/https://www.mozilla.org/security/advisories/mfsa2019-15/