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
Upstream
Released (3.55)
Ubuntu 20.04 LTS (Focal Fossa)
Released (2:3.49.1-1ubuntu1.5)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (2:3.35-2ubuntu2.12)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (2:3.28.4-0ubuntu0.16.04.14)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (2:3.28.4-0ubuntu0.14.04.5+esm8)
Patches:
Upstream: https://hg.mozilla.org/projects/nss/rev/f282556e6cc7715f5754aeaadda6f902590e7e38
Upstream: https://hg.mozilla.org/projects/nss/rev/c25adfdfab34ddb08d3262aac3242e3399de1095