FreeBSD : dnsmasq -- DNS cache poisoning, and DNSSEC buffer overflow, vulnerabilities (5b5cf6e5-5b51-11eb-95ac-7f9491278677)

high Nessus Plugin ID 145236


The remote FreeBSD host is missing one or more security-related updates.


Simon Kelley reports :

There are broadly two sets of problems. The first is subtle errors in dnsmasq's protections against the chronic weakness of the DNS protocol to cache-poisoning attacks; the Birthday attack, Kaminsky, etc.[...]

the second set of errors is a good old fashioned buffer overflow in dnsmasq's DNSSEC code. If DNSSEC validation is enabled, an installation is at risk.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 145236

File Name: freebsd_pkg_5b5cf6e55b5111eb95ac7f9491278677.nasl

Version: 1.4

Type: local

Published: 1/21/2021

Updated: 2/1/2021

Risk Information


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

CVSS Score Source: CVE-2020-25682


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: p-cpe:/a:freebsd:freebsd:dnsmasq, p-cpe:/a:freebsd:freebsd:dnsmasq-devel, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 1/20/2021

Vulnerability Publication Date: 9/16/2020

Reference Information

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