Knot DNS 1.6.x < 1.6.6 / 2.0.x < 2.0.2 NAPTR Record DoS

medium Nessus Plugin ID 87965
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 server is affected by a denial of service vulnerability.

Description

The Knot DNS server running on the remote host is version 1.6.x prior to 1.6.6 or 2.0.x prior to 2.0.2. It is, therefore, affected by an out-of-bounds read error that occurs when parsing malformed NAPTR records. An unauthenticated, remote attacker can exploit this to disclose memory contents or crash the knotd daemon, resulting in a denial of service.

Solution

Upgrade to Knot DNS version 1.6.6 / 2.0.2 or later.

See Also

https://gitlab.labs.nic.cz/users/sign_in

https://gitlab.labs.nic.cz/users/sign_in

http://www.nessus.org/u?dc772026

http://www.nessus.org/u?9eb6eda3

Plugin Details

Severity: Medium

ID: 87965

File Name: knot_dns_2_0_2.nasl

Version: 1.5

Type: remote

Family: DNS

Published: 1/18/2016

Updated: 11/15/2018

Dependencies: knot_dns_version.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: x-cpe:/a:cz.nic:knot_dns

Required KB Items: knot_dns/proto, Settings/ParanoidReport

Patch Publication Date: 11/24/2015

Vulnerability Publication Date: 11/24/2015