TI-2019-12704 Aliases CVE-2019-17021 GHSA-23vm-fc59-7qjv

Race condition in Mozilla Firefox ESR

LOW 28CWE-362Published 2020-01-08 · Updated 2024-08-05

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

Why it matters now

EPSS 0.01867 79th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD

Fix Fixed Firefox ESR (Mozilla): 68.4Firefox (Mozilla): 72

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	Firefox ESR	before 68.4	68.4	Patch available	CNA
Mozilla	Firefox	before 72	72	Patch available	CNA

Firefox ESR VendorMozilla Affected before 68.4 Fixed in 68.4 Patch available CNA
Firefox VendorMozilla Affected before 72 Fixed in 72 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 72.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 68.4	Vulnerable	Mozilla
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft
cpe:2.3:o:opensuse:leap:15.1:::::::*	15.1	Vulnerable	openSUSE

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 72.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 68.4 Vulnerable ·Mozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

Fix · CNA Firefox ESR (Mozilla) Fixed in 68.4
Fix · CNA Firefox (Mozilla) Fixed in 72

Fixed in the same release

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

Advisory · 2020-01-08
Mozilla Firefox, Firefox ESR — openSUSE-SU-2020:0060
6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2019-12707 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12698 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 42
Show all 6 records → Advisory →
Advisory · 2020-01-08
Mozilla Firefox, Firefox ESR — openSUSE-SU-2020:0094
6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2019-12707 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2019-12698 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 42
Show all 6 records → Advisory →

Vendor assessments

Red Hat

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

Not affected: 4 products

Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8

Timeline

2026-10-02 Threatist record created from CVE-2019-17021
2026-10-03 Alias added: GHSA-23vm-fc59-7qjv

References

Exploit 2

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