Unbound < 1.6.4 parse_edns_options Heap Buffer Overflow

medium Nessus Plugin ID 106383

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Synopsis

The remote name server is affected by a heap buffer overflow.

Description

According to its self-reported version number, the remote Unbound DNS resolver is affected by a heap buffer overflow in parse_edns_options.

Solution

Upgrade to Unbound version 1.6.4 or later.

See Also

https://nlnetlabs.nl/projects/unbound/download/

Plugin Details

Severity: Medium

ID: 106383

File Name: unbound_1_6_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

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

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

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/a:unbound:unbound

Required KB Items: Settings/ParanoidReport, unbound/version

Patch Publication Date: 1/19/2018

Vulnerability Publication Date: 1/19/2018