CVE-2019-9815 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  8.1 HIGH
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-203 Observable Differences in Behavior to Error Inputs cwe source acceptance level NIST  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9815
NVD Published Date:
07/23/2019
NVD Last Modified:
08/24/2020
Source:
Mozilla Corporation