dnsmasq < 2.81 Denial of Service (DoS) Vulnerability

low Nessus Plugin ID 136411

Language:

New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote DNS / DHCP service is affected by DoS vulnerability

Description

The version of dnsmasq installed on the remote host is prior to 2.81. It is, therefore, affected by a denial of service (DoS) vulnerability in 'helper.c' due to a memory leak. An unauthenticated, remote attacker can exploit this issue, to cause the application to stop responding.

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

Solution

Upgrade to dnsmasq 2.81 or later.

See Also

http://www.nessus.org/u?19058d2f

http://www.thekelleys.org.uk/dnsmasq/CHANGELOG

Plugin Details

Severity: Low

ID: 136411

File Name: dnsmasq_2_81.nasl

Version: 1.3

Type: remote

Family: DNS

Published: 5/8/2020

Updated: 2/19/2021

Dependencies: dns_version.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2019-14834

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

Temporal Vector: E:U/RL:OF/RC:C

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: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:thekelleys:dnsmasq

Required KB Items: dns_server/version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 8/19/2019

Vulnerability Publication Date: 8/19/2019

Reference Information

CVE: CVE-2019-14834

IAVA: 2020-A-0194-S