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CVE-2020-12401

Published: 5 August 2020

During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Priority

Medium

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package Release Status
nss
Launchpad, Ubuntu, Debian
upstream
Released (2:3.55-1)
trusty
Released (2:3.28.4-0ubuntu0.14.04.5+esm7)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (2:3.35-2ubuntu2.11)
focal
Released (2:3.49.1-1ubuntu1.4)
xenial
Released (2:3.28.4-0ubuntu0.16.04.13)
Patches:
upstream: https://hg.mozilla.org/projects/nss/rev/aeb2e583ee957a699d949009c7ba37af76515c20
firefox
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic
Released (80.0+build2-0ubuntu0.18.04.1)
focal
Released (80.0+build2-0ubuntu0.20.04.1)
upstream
Released (80)
xenial
Released (80.0+build2-0ubuntu0.16.04.1)

Severity score breakdown

Parameter Value
Base score 4.7
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N