CVE-2019-9815 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

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/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1