RHEL 8 : dnsmasq (RHSA-2021:0152)

high Nessus Plugin ID 145082

Synopsis

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

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0152 advisory.

- dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled (CVE-2020-25681)

- dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled (CVE-2020-25682)

- dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled (CVE-2020-25683)

- 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)

- dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled (CVE-2020-25687)

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

Solution

Update the affected dnsmasq and / or dnsmasq-utils packages.

See Also

https://cwe.mitre.org/data/definitions/122.html

https://cwe.mitre.org/data/definitions/290.html

https://cwe.mitre.org/data/definitions/358.html

https://access.redhat.com/security/cve/CVE-2020-25681

https://access.redhat.com/security/cve/CVE-2020-25682

https://access.redhat.com/security/cve/CVE-2020-25683

https://access.redhat.com/security/cve/CVE-2020-25684

https://access.redhat.com/security/cve/CVE-2020-25685

https://access.redhat.com/security/cve/CVE-2020-25686

https://access.redhat.com/security/cve/CVE-2020-25687

https://access.redhat.com/errata/RHSA-2021:0152

https://bugzilla.redhat.com/1881875

https://bugzilla.redhat.com/1882014

https://bugzilla.redhat.com/1882018

https://bugzilla.redhat.com/1889686

https://bugzilla.redhat.com/1889688

https://bugzilla.redhat.com/1890125

https://bugzilla.redhat.com/1891568

Plugin Details

Severity: High

ID: 145082

File Name: redhat-RHSA-2021-0152.nasl

Version: 1.7

Type: local

Agent: unix

Published: 1/19/2021

Updated: 10/7/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

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

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

CVSS Score Source: CVE-2020-25682

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:redhat:rhel_e4s:8.1, cpe:/o:redhat:rhel_eus:8.1, 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: 1/19/2021

Vulnerability Publication Date: 1/19/2021

Reference Information

CVE: CVE-2020-25681, CVE-2020-25682, CVE-2020-25683, CVE-2020-25684, CVE-2020-25685, CVE-2020-25686, CVE-2020-25687

RHSA: 2021:0152

IAVA: 2021-A-0041

CWE: 122, 290, 358