Rocky Linux 8 : nss (RLSA-2021:0538)

critical Nessus Plugin ID 184896

Synopsis

The remote Rocky Linux host is missing one or more security updates.

Description

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:0538 advisory.

- When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-12400)

- During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-12401)

- A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. 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. (CVE-2020-12403)

- When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80. (CVE-2020-6829)

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

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 184896

File Name: rocky_linux_RLSA-2021-0538.nasl

Version: 1.0

Type: local

Family: Rocky Linux Local Security Checks

Published: 11/7/2023

Updated: 11/7/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2020-12403

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:rocky:linux:nss, p-cpe:/a:rocky:linux:nss-debuginfo, p-cpe:/a:rocky:linux:nss-debugsource, p-cpe:/a:rocky:linux:nss-devel, p-cpe:/a:rocky:linux:nss-softokn, p-cpe:/a:rocky:linux:nss-softokn-debuginfo, p-cpe:/a:rocky:linux:nss-softokn-devel, p-cpe:/a:rocky:linux:nss-softokn-freebl, p-cpe:/a:rocky:linux:nss-softokn-freebl-debuginfo, p-cpe:/a:rocky:linux:nss-softokn-freebl-devel, p-cpe:/a:rocky:linux:nss-sysinit, p-cpe:/a:rocky:linux:nss-sysinit-debuginfo, p-cpe:/a:rocky:linux:nss-tools, p-cpe:/a:rocky:linux:nss-tools-debuginfo, p-cpe:/a:rocky:linux:nss-util, p-cpe:/a:rocky:linux:nss-util-debuginfo, p-cpe:/a:rocky:linux:nss-util-devel, cpe:/o:rocky:linux:8

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/16/2021

Vulnerability Publication Date: 8/13/2020

Reference Information

CVE: CVE-2020-12400, CVE-2020-12401, CVE-2020-12403, CVE-2020-6829

Detections

Analytics