Scientific Linux Security Update : dnsmasq on SL7.x x86_64 (2021:0153)

low Nessus Plugin ID 145438


The remote Scientific Linux host is missing one or more security updates.


The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the SLSA-2021:0153-1 advisory.

- 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)

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


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

See Also

Plugin Details

Severity: Low

ID: 145438

File Name: sl_20210119_dnsmasq_on_SL7_x.nasl

Version: 1.4

Type: local

Agent: unix

Published: 1/26/2021

Updated: 12/5/2022

Supported Sensors: Nessus Agent, Nessus

Risk Information


Risk Factor: Low

Score: 2.2


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


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:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:dnsmasq, p-cpe:/a:fermilab:scientific_linux:dnsmasq-debuginfo, p-cpe:/a:fermilab:scientific_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-2020-25684, CVE-2020-25685, CVE-2020-25686