Alibaba Cloud Linux 3 : 0029: gnutls and nettle (ALINUX3-SA-2021:0029)

high Nessus Plugin ID 236665

Synopsis

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

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2021:0029 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2021-20305:
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 236665

File Name: alinux3_sa_2021-0029.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 5/14/2025

Updated: 5/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2021-20305

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:nettle-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:nettle-debugsource, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-dane-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-utils-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-c%2b%2b, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-c%2b%2b-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-utils, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:nettle, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-dane, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:nettle-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:gnutls-debugsource

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/15/2021

Vulnerability Publication Date: 4/5/2021

Reference Information

CVE: CVE-2021-20305

Detections

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