CVE-2020-12403

Public on 2020-11-09
Modified on 2021-07-12
Description
A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS. 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.
Severity
Medium
CVSS v3 Base Score
7.4
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 nspr 2020-11-09 21:02 ALAS2-2020-1559
Amazon Linux 2 nss-util 2020-11-09 21:02 ALAS2-2020-1559
Amazon Linux 2 nss-softokn 2020-11-09 21:02 ALAS2-2020-1559
Amazon Linux 2 nss 2020-11-09 21:02 ALAS2-2020-1559
Amazon Linux 1 nspr 2021-07-08 18:41 ALAS-2021-1522
Amazon Linux 1 nss-util 2021-07-08 18:41 ALAS-2021-1522
Amazon Linux 1 nss-softokn 2021-07-08 18:41 ALAS-2021-1522

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD CVSSv2 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P
NVD CVSSv3 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H