dnsmasq < 2.83 Multiple Vulnerabilities (DNSPOOQ)

high Nessus Plugin ID 145073
New! Plugin Severity Now Using CVSS v3

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The remote DNS / DHCP service is affected by multiple vulnerabilities.


The version of dnsmasq installed on the remote host is prior to 2.83. It is, therefore, affected by multiple vulnerabilities:

- Multiple remote buffer overflows in the DNSSEC implementation. (CVE-2020-25681, CVE-2020-25682, CVE-2020-25683, CVE-2020-25687)

- A UDP DNS cache poisoning vulnerability. (CVE-2020-25684)

- Usage of a known weak hashing function. (CVE-2020-25685)

- An issue handling multiple simultaneous DNS queries. (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.


Upgrade to dnsmasq 2.83 or later.

See Also



Plugin Details

Severity: High

ID: 145073

File Name: dnsmasq_2_83.nasl

Version: 1.4

Type: remote

Family: DNS

Published: 1/19/2021

Updated: 1/29/2021

Dependencies: dns_version.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2020-25682


Risk Factor: Medium

Score: 6.7


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


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:/a:thekelleys:dnsmasq

Required KB Items: dns_server/version, Settings/ParanoidReport

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

IAVA: 2021-A-0041