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CVE-2020-12403

Published: 18 August 2020

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.

Priority

Medium

CVSS 3 base score: 9.1

Status

Package Release Status
nss
Launchpad, Ubuntu, Debian
bionic
Released (2:3.35-2ubuntu2.12)
focal
Released (2:3.49.1-1ubuntu1.5)
precise
Released (2:3.28.4-0ubuntu0.12.04.11)
trusty
Released (2:3.28.4-0ubuntu0.14.04.5+esm8)
upstream
Released (3.55)
xenial
Released (2:3.28.4-0ubuntu0.16.04.14)