ISC BIND 9.0.x < 9.9.6-P1 'named' Delegation Handling DoS

high Nessus Network Monitor Plugin ID 8602
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.


The remote DNS server may be affected by a remote denial of service vulnerability.


Versions of ISC BIND earlier than 9.9.6-P1 are unpatched for a denial of service vulnerability that can be triggered when handling a maliciously constructed request. A maliciously constructed query or zone request can cause the service to issue unlimited queries in an attempt to follow a delegation, leading to a denial of service condition that terminates the 'named' service.


Updates have been released by the vendor. BIND 9.9.6-P1 fixes this vulnerability, as does BIND 9.10.1-P1. Apply the vendor update, or update to a later version.

See Also

Plugin Details

Severity: High

ID: 8602

Family: DNS Servers

Published: 12/15/2014

Updated: 3/6/2019

Dependencies: 1003

Nessus ID: 79861

Risk Information


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C


Risk Factor: High

Base Score: 7.5

Temporal Score: 7.2

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

Temporal Vector: CVSS:3.0/E:X/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*

Reference Information

CVE: CVE-2014-8500

BID: 71590

IAVA: 2014-A-0196