CVE-2019-9815

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1546544

https://www.mozilla.org/security/advisories/mfsa2019-15/

https://www.mozilla.org/security/advisories/mfsa2019-14/

https://www.mozilla.org/security/advisories/mfsa2019-13/

https://mdsattacks.com/

Details

Source: MITRE

Published: 2019-07-23

Updated: 2021-09-08

Type: CWE-203

Risk Information

CVSS v2

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.1

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

Impact Score: 5.9

Exploitability Score: 2.2

Severity: HIGH

Tenable Plugins

View all (14 total)

IDNameProductFamilySeverity
125809openSUSE Security Update : MozillaFirefox (openSUSE-2019-1534)NessusSuSE Local Security Checks
critical
125702SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2019:1405-1)NessusSuSE Local Security Checks
critical
125672SUSE SLED12 / SLES12 Security Update : MozillaFirefox (SUSE-SU-2019:1388-1)NessusSuSE Local Security Checks
critical
125669openSUSE Security Update : MozillaThunderbird (openSUSE-2019-1484)NessusSuSE Local Security Checks
critical
125363Mozilla Firefox ESR < 60.7NessusWindows
critical
125362Mozilla Firefox ESR < 60.7NessusMacOS X Local Security Checks
critical
125361Mozilla Firefox < 67.0NessusWindows
critical
125360Mozilla Firefox < 67.0NessusMacOS X Local Security Checks
critical
125359Mozilla Thunderbird < 60.7NessusWindows
critical
125358Mozilla Thunderbird < 60.7NessusMacOS X Local Security Checks
critical
125346FreeBSD : mozilla -- multiple vulnerabilities (44b6dfbf-4ef7-4d52-ad52-2b1b05d81272)NessusFreeBSD Local Security Checks
critical
700733Mozilla Firefox ESR < 60.7 Multiple VulnerabilitiesNessus Network MonitorWeb Clients
high
700727Mozilla Firefox < 67.0 Multiple VulnerabilitiesNessus Network MonitorWeb Clients
high
700742Mozilla Thunderbird < 60.7 Multiple VulnerabilitiesNessus Network MonitorSMTP Clients
high