TI-2020-05538 Aliases CVE-2020-6829 GHSA-cc99-55qg-f87r

When performing EC scalar point multiplication, the wNAF point multiplication algorithm…

LOW 27Published 2020-10-28 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · None · None
Fix status: Partial Red Hat: 9 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Why it matters now

EPSS 0.01479 74th percentileScored 2026-11-07

Fix Partial Firefox (Mozilla): 80Firefox for Android (Mozilla): 80Red Hat: 3 advisoriesRed Hat: 9 fixed, 2 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	before 80	80	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 for Android VendorMozilla Affected before 80 Fixed in 80 Patch available CNA

CPE configurations NVD · 2

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

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

Remediation

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

Red Hat 3 advisories

RHSA-2021:0949 Released 2021-03-22 · Red Hat rating Low
Red Hat OpenShift Do openshift/odo-init-image 1.1.3 security update
- OpenShift Do 1 openshiftdo/odo-init-image-rhel7
RHSA-2021:0538 Released 2021-02-16 · Red Hat rating Moderate
nss security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) nss-3.53.1-17.el8_3, nss-devel-3.53.1-17.el8_3, nss-softokn-3.53.1-17.el8_3 +7
RHSA-2020:4076 Released 2020-09-29 · Red Hat rating Moderate
nss and nspr security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) nspr-4.25.0-2.el7_9, nss-3.53.1-3.el7_9, nss-softokn-3.53.1-6.el7_9 +4
- Red Hat Enterprise Linux Client Optional (v. 7) nspr-devel-4.25.0-2.el7_9, nss-devel-3.53.1-3.el7_9, nss-pkcs11-devel-3.53.1-3.el7_9 +3
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) nspr-devel-4.25.0-2.el7_9, nss-devel-3.53.1-3.el7_9, nss-pkcs11-devel-3.53.1-3.el7_9 +3
- Red Hat Enterprise Linux Server (v. 7) nspr-4.25.0-2.el7_9, nspr-4.25.0-2.el7_9.ppc, nspr-devel-4.25.0-2.el7_9 +19
- Red Hat Enterprise Linux Server Optional (v. 7) nss-pkcs11-devel-3.53.1-3.el7_9, nss-pkcs11-devel-3.53.1-3.el7_9.ppc
- Red Hat Enterprise Linux Workstation (v. 7) nspr-4.25.0-2.el7_9, nspr-devel-4.25.0-2.el7_9, nss-3.53.1-3.el7_9 +9
- Red Hat Enterprise Linux Workstation Optional (v. 7) nss-pkcs11-devel-3.53.1-3.el7_9

Vendor assessments

Red Hat

Red Hat rating: Moderate. 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
OpenShift Do 1	Fixed	RHSA-2021:0949
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2021:0538
Red Hat Enterprise Linux Client (v. 7)	Fixed	RHSA-2020:4076
Red Hat Enterprise Linux Client Optional (v. 7)	Fixed	RHSA-2020:4076
Red Hat Enterprise Linux ComputeNode Optional (v. 7)	Fixed	RHSA-2020:4076
Red Hat Enterprise Linux Server (v. 7)	Fixed	RHSA-2020:4076
Red Hat Enterprise Linux Server Optional (v. 7)	Fixed	RHSA-2020:4076
Red Hat Enterprise Linux Workstation (v. 7)	Fixed	RHSA-2020:4076
Red Hat Enterprise Linux Workstation Optional (v. 7)	Fixed	RHSA-2020:4076

Not affected: 1 product

Red Hat OpenShift Container Platform 4

Timeline

2026-10-02 Threatist record created from CVE-2020-6829
2026-10-03 Alias added: GHSA-cc99-55qg-f87r

References

Advisory 2

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