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
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | nspr | 2021-07-08 | ALAS-2021-1522 | Fixed |
| Amazon Linux 2 - Core | nspr | 2020-11-09 | ALAS2-2020-1559 | Fixed |
| Amazon Linux 2 - Core | nss | 2020-11-09 | ALAS2-2020-1559 | Fixed |
| Amazon Linux 1 | nss-softokn | 2021-07-08 | ALAS-2021-1522 | Fixed |
| Amazon Linux 2 - Core | nss-softokn | 2020-11-09 | ALAS2-2020-1559 | Fixed |
| Amazon Linux 1 | nss-util | 2021-07-08 | ALAS-2021-1522 | Fixed |
| Amazon Linux 2 - Core | nss-util | 2020-11-09 | ALAS2-2020-1559 | Fixed |
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 |