CVEvulnerability
CVE-2019-9815
8.1 HIGH
Official page ↗
- Status
- Modified
- Published
- 2019-07-23
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 8.1 HIGH — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-203
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 configurations
• mozilla firefox (< 67.0)
• mozilla firefox esr (< 60.7)
• mozilla thunderbird (< 60.7)
Related
Weakness · CWE (1)
- CWE-203 Observable Discrepancy weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1546544 Permissions Required, Third Party Advisory
- https://mdsattacks.com/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-13/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-14/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-15/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1546544 Permissions Required, Third Party Advisory
- https://mdsattacks.com/ Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-13/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-14/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-15/ Vendor Advisory