TI-2019-07201 Aliases CVE-2019-9815 GHSA-crxf-6fx4-jr2j

Observable discrepancy in Mozilla Thunderbird

LOW 39CWE-203Published 2019-07-23 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-203.

Summary

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.

Why it matters now

EPSS 0.01828 78th percentileScored 2026-11-07

Fix Fixed Thunderbird (Mozilla): 60.7Firefox (Mozilla): 67+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Thunderbird	before 60.7	60.7	Patch available	CNA
Mozilla	Firefox	before 67	67	Patch available	CNA
Mozilla	Firefox ESR	before 60.7	60.7	Patch available	CNA

Thunderbird VendorMozilla Affected before 60.7 Fixed in 60.7 Patch available CNA
Firefox VendorMozilla Affected before 67 Fixed in 67 Patch available CNA
Firefox ESR VendorMozilla Affected before 60.7 Fixed in 60.7 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 67.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 60.7	Vulnerable	Mozilla
cpe:2.3:a:mozilla:thunderbird::::::::	before 60.7	Vulnerable	Mozilla
cpe:2.3:o:apple:macos:-:::::::*	not specified by NVD	Running on	Apple

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 67.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 60.7 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.7 Vulnerable ·Mozilla
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple

Remediation

Fix · CNA Thunderbird (Mozilla) Fixed in 60.7
Fix · CNA Firefox (Mozilla) Fixed in 67
Fix · CNA Firefox ESR (Mozilla) Fixed in 60.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2019-07-23
Mozilla Firefox 67
20 records Highest priority Priority MEDIUM 7 MEDIUM, 13 LOW
Other records, highest priority first
- TI-2019-08754 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 47
- TI-2019-07186 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 46
- TI-2019-08753 Use after free in Mozilla ThunderbirdPriority MEDIUM 45
Show all 20 records →
Release · 2019-07-23
Mozilla Firefox ESR, Thunderbird 60.7
12 records Highest priority Priority MEDIUM 6 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2019-08754 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 47
- TI-2019-07186 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 46
- TI-2019-08753 Use after free in Mozilla ThunderbirdPriority MEDIUM 45
Show all 12 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 3 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8

Timeline

2026-10-02 Threatist record created from CVE-2019-9815
2026-10-03 Alias added: GHSA-crxf-6fx4-jr2j

References

Advisory 5

TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8

See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences