Unbound < 1.3.4 NSEC3 Signature Verification DNS Spoofing Vulnerability (CVE-2009-3602)

high Nessus Plugin ID 106379
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 name server is affected by a remote DNS spoofing vulnerability.


According to its self-reported version number, the remote Unbound DNS resolver is affected by a remote DNS spoofing vulnerability when verifying NSEC3 signatures.


Upgrade to Unbound version 1.3.4 or later.

See Also


Plugin Details

Severity: High

ID: 106379

File Name: unbound_1_3_4.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


Risk Factor: Low

Score: 3.4


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

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


Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: cpe:/a:unbound:unbound

Required KB Items: Settings/ParanoidReport, unbound/version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2009

Vulnerability Publication Date: 10/7/2009

Reference Information

CVE: CVE-2009-3602

BID: 37459

CWE: 310