Alibaba Cloud Linux 3 : 0083: unbound (ALINUX3-SA-2021:0083)

high Nessus Plugin ID 236148

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 multiple vulnerabilities as referenced in the ALINUX3-SA-2021:0083 advisory.

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

CVE-2020-12662:
Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an NXNSAttack issue. This is triggered by random subdomains in the NSDNAME in NS records.

CVE-2020-12663:
Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.

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

Update the affected packages.

Plugin Details

Severity: High

ID: 236148

File Name: alinux3_sa_2021-0083.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: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-12663

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:unbound, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:unbound-libs-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:unbound-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-unbound-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:unbound-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:unbound-libs, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-unbound, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:unbound-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: 12/10/2021

Vulnerability Publication Date: 5/19/2020

Reference Information

CVE: CVE-2020-12662, CVE-2020-12663

Detections

Analytics