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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
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CVSS v3 Base Score
7.4
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Affected Packages

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

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