TI-2020-09931 Aliases CVE-2020-12413 GHSA-4mgq-9qgw-ghcx

Observable discrepancy in Mozilla Firefox

LOW 27CWE-203Published 2023-02-16 · Updated 2025-03-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-203.

Summary

The Raccoon attack is a timing attack on DHE ciphersuites inherit in the TLS specification. To mitigate this vulnerability, Firefox disabled support for DHE ciphersuites.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00594 48th percentileScored 2026-11-07

Fix Partial Firefox (Mozilla): 78Firefox ESR (Mozilla): 68.10Red Hat: 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox	before 78	78	Patch available	CNA
Mozilla	Firefox ESR	before 68.10	68.10	Patch available	CNA

Firefox VendorMozilla Affected before 78 Fixed in 78 Patch available CNA
Firefox ESR VendorMozilla Affected before 68.10 Fixed in 68.10 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 78.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 68.10.0	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 78.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 68.10.0 Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 78
Fix · CNA Firefox ESR (Mozilla) Fixed in 68.10

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
Red Hat Enterprise Linux 9	Affected	No fix planned: Will not fix

Timeline

2026-10-02 Threatist record created from CVE-2020-12413
2026-10-03 Alias added: GHSA-4mgq-9qgw-ghcx

References

Other 2

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