dnsmasq < 2.63test1 libvirtd TCP Network Packet Parsing Response DNS Amplification DoS

medium Nessus Plugin ID 87594
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote DNS / DHCP service is affected by a denial of service vulnerability.

Description

The remote dnsmasq server is running a version prior to 2.63test1. It is, therefore, affected by a denial of service vulnerability in libvirtd due to improper parsing of malformed network packets. An unauthenticated, remote attacker can exploit this to cause an amplification of a large amount of DNS queries, resulting in a denial of service condition.

Solution

Upgrade to dnsmasq 2.63test1 or later.

See Also

http://www.nessus.org/u?a481d28c

http://www.thekelleys.org.uk/dnsmasq/CHANGELOG

Plugin Details

Severity: Medium

ID: 87594

File Name: dnsmasq_dos-CVE-2012-3411.nasl

Version: 1.3

Type: remote

Family: DNS

Published: 12/22/2015

Updated: 7/10/2018

Dependencies: dns_version.nasl

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/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: 6/20/2012

Vulnerability Publication Date: 6/20/2012

Reference Information

CVE: CVE-2012-3411

BID: 54353