CVE-2019-17023

Public on 2020-11-09
Modified on 2021-07-12
Description
A protocol downgrade flaw was found in Network Security Services (NSS). After a HelloRetryRequest has been sent, the client may negotiate a lower protocol than TLS 1.3, resulting in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming Application Data records will be ignored.
Severity
Low
CVSS v3 Base Score
5.3
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 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD CVSSv2 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
NVD CVSSv3 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N