Amazon Linux 2 : dnsmasq (ALAS-2020-1469)

High Nessus Plugin ID 139337

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VPR Score: 4

Synopsis

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

Description

A flaw was found in the default configuration of dnsmasq, as shipped with Fedora and Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option `local-service` is not enabled.
Running dnsmasq in this manner may inadvertently make it an open resolver accessible from any address on the internet. This flaw allows an attacker to conduct a Distributed Denial of Service (DDoS) against other systems. (CVE-2020-14312)

Solution

Run 'yum update dnsmasq' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2020-1469.html

Plugin Details

Severity: High

ID: 139337

File Name: al2_ALAS-2020-1469.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2020/08/06

Updated: 2020/08/06

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 4

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:dnsmasq, p-cpe:/a:amazon:linux:dnsmasq-debuginfo, p-cpe:/a:amazon:linux:dnsmasq-utils, cpe:/o:amazon:linux:2

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

Patch Publication Date: 2020/08/05

Reference Information

CVE: CVE-2020-14312

ALAS: 2020-1469