Debian DLA-627-1 : pdns security update

high Nessus Plugin ID 93567

Synopsis

The remote Debian host is missing a security update.

Description

Multiple vulnerabilities have been discovered in pdns, an authoritative DNS server. The Common Vulnerabilities and Exposures project identifies the following problems :

CVE-2016-5426 / CVE-2016-5427

Florian Heinz and Martin Kluge reported that the PowerDNS Authoritative Server accepts queries with a qname's length larger than 255 bytes and does not properly handle dot inside labels. A remote, unauthenticated attacker can take advantage of these flaws to cause abnormal load on the PowerDNS backend by sending specially crafted DNS queries, potentially leading to a denial of service.

CVE-2016-6172

It was reported that a malicious primary DNS server can crash a secondary PowerDNS server due to improper restriction of zone size limits. This update adds a feature to limit AXFR sizes in response to this flaw.

For Debian 7 'Wheezy', these problems have been fixed in version 3.1-4.1+deb7u2.

We recommend that you upgrade your pdns packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2016/09/msg00020.html

https://packages.debian.org/source/wheezy/pdns

Plugin Details

Severity: High

ID: 93567

File Name: debian_DLA-627.nasl

Version: 2.7

Type: local

Agent: unix

Published: 9/19/2016

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:pdns-backend-sqlite, p-cpe:/a:debian:debian_linux:pdns-server-dbg, p-cpe:/a:debian:debian_linux:pdns-backend-ldap, cpe:/o:debian:debian_linux:7.0, p-cpe:/a:debian:debian_linux:pdns-backend-mysql, p-cpe:/a:debian:debian_linux:pdns-backend-pipe, p-cpe:/a:debian:debian_linux:pdns-backend-geo, p-cpe:/a:debian:debian_linux:pdns-server, p-cpe:/a:debian:debian_linux:pdns-backend-lua, p-cpe:/a:debian:debian_linux:pdns-backend-pgsql, p-cpe:/a:debian:debian_linux:pdns-backend-sqlite3

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 9/18/2016

Reference Information

CVE: CVE-2016-5426, CVE-2016-5427, CVE-2016-6172