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CVE-2020-6829

Published: 5 August 2020

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.

Notes

AuthorNote
leosilva
same fix/patches of CVE-2020-12400

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
nss
Launchpad, Ubuntu, Debian
bionic
Released (2:3.35-2ubuntu2.11)
focal
Released (2:3.49.1-1ubuntu1.4)
trusty
Released (2:3.28.4-0ubuntu0.14.04.5+esm7)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (2:3.55-1)
xenial
Released (2:3.28.4-0ubuntu0.16.04.13)
Patches:
upstream: https://hg.mozilla.org/projects/nss/rev/e55ab3145546ae3cf1333b43956a974675d2d25c
upstream: https://hg.mozilla.org/projects/nss/rev/3f022d5eca5d3cd0e366a825a5681953d76299d0
firefox
Launchpad, Ubuntu, Debian
bionic
Released (80.0+build2-0ubuntu0.18.04.1)
focal
Released (80.0+build2-0ubuntu0.20.04.1)
trusty Does not exist

upstream
Released (80)
xenial
Released (80.0+build2-0ubuntu0.16.04.1)

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N