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Amazon Linux 2 : nss (ALAS-2021-1664)

high Nessus Plugin ID 150978

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of nss installed on the remote host is prior to 3.53.1-7. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1664 advisory.

 - A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58. (CVE-2020-25648)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update nss' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1664.html

https://access.redhat.com/security/cve/CVE-2020-25648

Plugin Details

Severity: High

ID: 150978

File Name: al2_ALAS-2021-1664.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/23/2021

Updated: 12/12/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2020-25648

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:nss, p-cpe:/a:amazon:linux:nss-sysinit, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:nss-pkcs11-devel, p-cpe:/a:amazon:linux:nss-tools, p-cpe:/a:amazon:linux:nss-debuginfo, p-cpe:/a:amazon:linux:nss-devel

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/16/2021

Vulnerability Publication Date: 10/20/2020

Reference Information

CVE: CVE-2020-25648

ALAS: 2021-1664