FreeBSD : BIND,Knot,NSD,PowerDNS -- denial over service via oversized zone transfers (7d08e608-5e95-11e6-b334-002590263bf5)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

ISC reports :

DNS protocols were designed with the assumption that a certain amount
of trust could be presumed between the operators of primary and
secondary servers for a given zone. However, in current practice some
organizations have scenarios which require them to accept zone data
from sources that are not fully trusted (for example: providers of
secondary name service). A party who is allowed to feed data into a
zone (e.g. by AXFR, IXFR, or Dynamic DNS updates) can overwhelm the
server which is accepting data by intentionally or accidentally
exhausting that server's memory.

See also :

https://kb.isc.org/article/AA-01390
http://www.openwall.com/lists/oss-security/2016/07/06/4
http://www.nessus.org/u?2a7a1ae0

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 92832 ()

Bugtraq ID:

CVE ID: CVE-2016-6170
CVE-2016-6171
CVE-2016-6172
CVE-2016-6173

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