RHEL 7 : dnsmasq (RHSA-2021:0240)

low Nessus Plugin ID 145403

Synopsis

The remote Red Hat host is missing one or more security updates for dnsmasq.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0240 advisory.

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fix(es):

* dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25684)

* dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25685)

* dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker (CVE-2020-25686)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 RHEL dnsmasq package based on the guidance in RHSA-2021:0240.

See Also

http://www.nessus.org/u?84a92d0e

https://access.redhat.com/security/updates/classification/#moderate

https://access.redhat.com/security/vulnerabilities/RHSB-2021-001

https://access.redhat.com/errata/RHSA-2021:0240

https://bugzilla.redhat.com/show_bug.cgi?id=1889686

https://bugzilla.redhat.com/show_bug.cgi?id=1889688

https://bugzilla.redhat.com/show_bug.cgi?id=1890125

Plugin Details

Severity: Low

ID: 145403

File Name: redhat-RHSA-2021-0240.nasl

Version: 1.12

Type: local

Agent: unix

Published: 1/25/2021

Updated: 11/7/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 2.2

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2020-25686

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:L/A:N

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

Vulnerability Information

CPE: cpe:/o:redhat:rhel_aus:7.2, p-cpe:/a:redhat:enterprise_linux:dnsmasq, p-cpe:/a:redhat:enterprise_linux:dnsmasq-utils

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2021

Vulnerability Publication Date: 1/19/2021

Reference Information

CVE: CVE-2020-25684, CVE-2020-25685, CVE-2020-25686

CWE: 290, 326, 358

IAVA: 2021-A-0041

RHSA: 2021:0240