Knot DNS 2.4.x < 2.4.4 / 2.5.x < 2.5.2 TSIG Authentication Bypass Vulnerability (CVE-2017-11104)

medium Nessus Plugin ID 106196
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The remote DNS server is affected by an authentication bypass vulnerability.


The Knot DNS server running on the remote host is version 2.4.x prior to 2.4.5 or 2.5.x prior to 2.5.2. It is, therefore, affected by a TSIG authentication bypass vulnerability.


Upgrade to Knot DNS version 2.4.5 / 2.5.2 or later.

See Also

Plugin Details

Severity: Medium

ID: 106196

File Name: knot_dns_2_5_2.nasl

Version: 1.4

Type: remote

Family: DNS

Published: 1/19/2018

Updated: 7/13/2018

Dependencies: knot_dns_version.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

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


Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

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

Required KB Items: knot_dns/proto, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2017

Vulnerability Publication Date: 6/23/2017

Reference Information

CVE: CVE-2017-11104

BID: 99598