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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VPR Score: 3.6


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: 2018/01/19

Updated: 2018/07/13

Dependencies: 76798

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

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

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

CVSS v3.0

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: CVSS:3.0/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 Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2017/06/23

Vulnerability Publication Date: 2017/06/23

Reference Information

CVE: CVE-2017-11104

BID: 99598