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

High Nessus Network Monitor Plugin ID 8602

Synopsis

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

Description

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.

Solution

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

https://kb.isc.org/article/AA-01224/81/BIND-9.9.6-P1-Release-Notes.html

https://kb.isc.org/article/AA-01216/

Plugin Details

Severity: High

ID: 8602

Family: DNS Servers

Published: 2014/12/15

Modified: 2016/05/13

Dependencies: 1003

Nessus ID: 79861

Risk Information

Risk Factor: High

CVSSv2

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

CVSSv3

Base Score: 7.5

Temporal Score: 7.2

Vector: CVSS3#AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS3#E:X/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Reference Information

CVE: CVE-2014-8500

BID: 71590

IAVA: 2014-A-0196