Amazon Linux 2 : nss, nss-util, nss-softokn, nspr (ALAS-2021-1722)

critical Nessus Plugin ID 155760

Synopsis

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

Description

The version of nspr installed on the remote host is prior to 4.32.0-1. The version of nss installed on the remote host is prior to 3.67.0-4. The version of nss-softokn installed on the remote host is prior to 3.67.0-3. The version of nss- util installed on the remote host is prior to 3.67.0-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1722 advisory.

- NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.
(CVE-2021-43527)

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.
Run 'yum update nss-util' to update your system.
Run 'yum update nss-softokn' to update your system.
Run 'yum update nspr' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2021-1722.html

https://access.redhat.com/security/cve/CVE-2021-43527

Plugin Details

Severity: Critical

ID: 155760

File Name: al2_ALAS-2021-1722.nasl

Version: 1.5

Type: local

Agent: unix

Published: 12/1/2021

Updated: 12/20/2021

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

Risk Information

CVSS Score Source: CVE-2021-43527

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

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

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: 12/1/2021

Vulnerability Publication Date: 12/1/2021

Reference Information

CVE: CVE-2021-43527

ALAS: 2021-1722