TI-2020-12345 Aliases CVE-2020-15670 GHSA-j4ww-v8q8-vr74

Race condition in Mozilla Firefox

MEDIUM 40CWE-362Published 2020-10-01 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution, Denial of service
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416, CWE-617 and the CVSS impact.

Summary

Mozilla developers reported memory safety bugs present in Firefox for Android 79. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 80, Firefox ESR < 78.2, Thunderbird < 78.2, and Firefox for Android < 80.

Why it matters now

EPSS 0.01071 65th percentileScored 2026-11-07

Fix Fixed Firefox (Mozilla): 80Firefox ESR (Mozilla): 78.2+2 more products

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	before 80	80	Patch available	CNA
Mozilla	Firefox ESR	before 78.2	78.2	Patch available	CNA
Mozilla	Thunderbird	before 78.2	78.2	Patch available	CNA
Mozilla	Firefox for Android	before 80	80	Patch available	CNA

Firefox VendorMozilla Affected before 80 Fixed in 80 Patch available CNA
Firefox ESR VendorMozilla Affected before 78.2 Fixed in 78.2 Patch available CNA
Thunderbird VendorMozilla Affected before 78.2 Fixed in 78.2 Patch available CNA
Firefox for Android VendorMozilla Affected before 80 Fixed in 80 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::-::*	before 80.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 78.2	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_mobile::::::android::*	before 80.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:thunderbird::::::::	before 78.2	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:-:*:* Versions before 80.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 78.2 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:* Versions before 80.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 78.2 Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 80
Fix · CNA Firefox ESR (Mozilla) Fixed in 78.2
Fix · CNA Thunderbird (Mozilla) Fixed in 78.2
Fix · CNA Firefox for Android (Mozilla) Fixed in 80

Fixed in the same release

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

Release · 2020-10-01
Mozilla Firefox 80
7 records Highest priority Priority MEDIUM 3 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2020-12338 Uncontrolled search path in Mozilla FirefoxPriority MEDIUM 43
- TI-2020-12342 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 41
- TI-2020-12339 Incorrect authorization in Mozilla FirefoxPriority LOW 32
Show all 7 records →
Release · 2020-10-01
Mozilla Firefox for Android 80
5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2020-12339 Incorrect authorization in Mozilla FirefoxPriority LOW 32
- TI-2020-12341 Information disclosure through error messages in Mozilla FirefoxPriority LOW 31
- TI-2020-12343 A lock was missing when accessing a data structure and importing certificate information…Priority LOW 21
Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Important. 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-2020-15670
2026-10-03 Alias added: GHSA-j4ww-v8q8-vr74

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