Unbound < 1.6.3 use-caps-for-id Option qname Handling Denial of Service

medium Nessus Plugin ID 106382

Language:

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 name server is affected by a remote denial of service vulnerability.

Description

According to its self-reported version number, the remote Unbound DNS resolver is affected by a denial of service vulnerability when handling qnames in responses with the use-caps-for-id option enabled.

Solution

Upgrade to Unbound version 1.6.3 or later.

See Also

https://nlnetlabs.nl/projects/unbound/download/

Plugin Details

Severity: Medium

ID: 106382

File Name: unbound_1_6_3.nasl

Version: 1.5

Type: remote

Family: DNS

Published: 1/26/2018

Updated: 11/15/2018

Dependencies: unbound_version.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

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

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

Vulnerability Information

CPE: cpe:/a:unbound:unbound

Required KB Items: Settings/ParanoidReport, unbound/version

Patch Publication Date: 6/13/2017

Vulnerability Publication Date: 6/13/2017