Debian DLA-798-1 : pdns security update

medium Nessus Plugin ID 96779

Language:

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-2016-2120

Mathieu Lafon discovered that pdns does not properly validate records in zones. An authorized user can take advantage of this flaw to crash server by inserting a specially crafted record in a zone under their control and then sending a DNS query for that record.

CVE-2016-7068

Florian Heinz and Martin Kluge reported that pdns parses all records present in a query regardless of whether they are needed or even legitimate, allowing a remote, unauthenticated attacker to cause an abnormal CPU usage load on the pdns server, resulting in a partial denial of service if the system becomes overloaded.

CVE-2016-7072

Mongo discovered that the webserver in pdns is susceptible to a denial of service vulnerability. A remote, unauthenticated attacker to cause a denial of service by opening a large number of f TCP connections to the web server.

CVE-2016-7073 / CVE-2016-7074

Mongo discovered that pdns does not sufficiently validate TSIG signatures, allowing an attacker in position of man-in-the-middle to alter the content of an AXFR.

For Debian 7 'Wheezy', these problems have been fixed in version 3.1-4.1+deb7u3.

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.

Plugin Details

Severity: Medium

ID: 96779

File Name: debian_DLA-798.nasl

Version: 3.7

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 1/26/2017

Updated: 1/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2016-7074

CVSS v3

Risk Factor: Medium

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: 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: 1/25/2017

Reference Information

CVE: CVE-2016-2120, CVE-2016-7068, CVE-2016-7072, CVE-2016-7073, CVE-2016-7074

Detections

Analytics