Debian DLA-788-1 : pdns-recursor security update

medium Nessus Plugin ID 96537

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Synopsis

The remote Debian host is missing a security update.

Description

Florian Heinz and Martin Kluge reported that pdns-recursor, a recursive DNS server, 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.

For Debian 7 'Wheezy', these problems have been fixed in version 3.3-3+deb7u2.

We recommend that you upgrade your pdns-recursor 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 pdns-recursor, and pdns-recursor-dbg packages.

Plugin Details

Severity: Medium

ID: 96537

File Name: debian_DLA-788.nasl

Version: 3.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 1/17/2017

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.0

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 v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:pdns-recursor, p-cpe:/a:debian:debian_linux:pdns-recursor-dbg, cpe:/o:debian:debian_linux:7.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/16/2017

Reference Information

CVE: CVE-2016-9139

Detections

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