TI-2020-12332 Aliases CVE-2020-15657 GHSA-vxw8-wvxp-5f2r

Uncontrolled search path in Mozilla Firefox ESR

LOW 34CWE-427Published 2020-08-10 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-427.

Summary

Firefox could be made to load attacker-supplied DLL files from the installation directory. This required an attacker that is already capable of placing files in the installation directory. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

Why it matters now

EPSS 0.00353 29th percentileScored 2026-11-07

Fix Partial Firefox ESR (Mozilla): 78.1Firefox (Mozilla): 79+1 more productRed Hat: 4 without a fix

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 78.1	78.1	Patch available	CNA
Mozilla	Firefox	before 79	79	Patch available	CNA
Mozilla	Thunderbird	before 78.1	78.1	Patch available	CNA

Firefox ESR VendorMozilla Affected before 78.1 Fixed in 78.1 Patch available CNA
Firefox VendorMozilla Affected before 79 Fixed in 79 Patch available CNA
Thunderbird VendorMozilla Affected before 78.1 Fixed in 78.1 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 79.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 78.1	Vulnerable	Mozilla
cpe:2.3:a:mozilla:thunderbird::::::::	before 78.1	Vulnerable	Mozilla
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 79.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 78.1 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 78.1 Vulnerable ·Mozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

Fix · CNA Firefox ESR (Mozilla) Fixed in 78.1
Fix · CNA Firefox (Mozilla) Fixed in 79
Fix · CNA Thunderbird (Mozilla) Fixed in 78.1

Fixed in the same release

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

Release · 2020-08-10
Mozilla Firefox 79
8 records Highest priority Priority MEDIUM 2 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2020-12334 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 43
- TI-2020-12331 Type confusion in Mozilla Firefox ESRPriority MEDIUM 41
- TI-2020-12333 Improper check for unusual conditions in Mozilla Firefox ESRPriority LOW 32
Show all 8 records →
Release · 2020-08-10
Mozilla Firefox ESR, Thunderbird 78.1
6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2020-12331 Type confusion in Mozilla Firefox ESRPriority MEDIUM 41
- TI-2020-12333 Improper check for unusual conditions in Mozilla Firefox ESRPriority LOW 32
- TI-2020-12330 A redirected HTTP request which is observed or modified through a web extension could…Priority LOW 32
Show all 6 records →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 5	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 8	Affected	No fix planned: Will not fix

Not affected: 1 product

Red Hat Enterprise Linux 5

Timeline

2026-10-02 Threatist record created from CVE-2020-15657
2026-10-03 Alias added: GHSA-vxw8-wvxp-5f2r

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