Knot DNS 1.6.x < 1.6.6 / 2.0.x < 2.0.2 NAPTR Record DoS

Medium Nessus Plugin ID 87965

Synopsis

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

Description

The Knot DNS server running on the remote host is version 1.6.x prior to 1.6.6 or 2.0.x prior to 2.0.2. It is, therefore, affected by an out-of-bounds read error that occurs when parsing malformed NAPTR records. An unauthenticated, remote attacker can exploit this to disclose memory contents or crash the knotd daemon, resulting in a denial of service.

Solution

Upgrade to Knot DNS version 1.6.6 / 2.0.2 or later.

See Also

https://gitlab.labs.nic.cz/labs/knot/raw/v1.6.6/NEWS

https://gitlab.labs.nic.cz/labs/knot/raw/v2.0.2/NEWS

http://www.nessus.org/u?dc772026

http://www.nessus.org/u?9eb6eda3

Plugin Details

Severity: Medium

ID: 87965

File Name: knot_dns_2_0_2.nasl

Version: $Revision: 1.2 $

Type: remote

Family: DNS

Published: 2016/01/18

Modified: 2016/04/28

Dependencies: 76798

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 6.4

Temporal Score: 4.7

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

Temporal Vector: CVSS2#E:U/RL:OF/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: 2015/11/24

Vulnerability Publication Date: 2015/11/24