Debian dla-3327 : libnss3 - security update

critical Nessus Plugin ID 171786

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3327 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-3327-1 [email protected] https://www.debian.org/lts/security/ Markus Koschany February 20, 2023 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : nss Version : 2:3.42.1-1+deb10u6 CVE ID : CVE-2020-6829 CVE-2020-12400 CVE-2020-12401 CVE-2020-12403 CVE-2023-0767

Multiple security vulnerabilities have been discovered in nss, the Network Security Service libraries.

CVE-2020-6829

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.

CVE-2020-12400

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.

CVE-2020-12401

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.

CVE-2020-12403

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.

CVE-2023-0767

Christian Holler discovered that incorrect handling of PKCS 12 Safe Bag attributes may result in execution of arbitrary code if a specially crafted PKCS 12 certificate bundle is processed.

For Debian 10 buster, these problems have been fixed in version 2:3.42.1-1+deb10u6.

We recommend that you upgrade your nss packages.

For the detailed security status of nss please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/nss

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

Solution

Upgrade the libnss3 packages.

Plugin Details

Severity: Critical

ID: 171786

File Name: debian_DLA-3327.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/22/2023

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:libnss3-dev, p-cpe:/a:debian:debian_linux:libnss3-tools, p-cpe:/a:debian:debian_linux:libnss3

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 2/20/2023

Vulnerability Publication Date: 8/13/2020

Reference Information

CVE: CVE-2020-12400, CVE-2020-12401, CVE-2020-12403, CVE-2020-6829, CVE-2023-0767

Detections

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