Detections
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Amazon Linux AMI : dnsmasq (ALAS-2020-1458)

low Nessus Plugin ID 173278

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Synopsis

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

Description

The version of dnsmasq installed on the remote host is prior to 2.76-16.16. It is, therefore, affected by a vulnerability as referenced in the ALAS-2020-1458 advisory.

 A flaw was found in the Dnsmasq application where a remote attacker can trigger a memory leak by sending specially crafted DHCP responses to the server. A successful attack is dependent on a specific configuration regarding the domain name set into the dnsmasq.conf file. Over time, the memory leak may cause the process to run out of memory and terminate, causing a denial of service. (CVE-2019-14834)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update dnsmasq' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2020-1458.html

https://alas.aws.amazon.com/cve/html/CVE-2019-14834.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Low

ID: 173278

File Name: ala_ALAS-2020-1458.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/22/2023

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2019-14834

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/16/2020

Vulnerability Publication Date: 1/7/2020

Reference Information

CVE: CVE-2019-14834

IAVA: 2020-A-0194-S