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Debian DSA-3763-1 : pdns-recursor - security update

high Nessus Plugin ID 96496

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Synopsis

The remote Debian host is missing a security-related 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.

Solution

Upgrade the pdns-recursor packages.

For the stable distribution (jessie), this problem has been fixed in version 3.6.2-2+deb8u3.

See Also

https://packages.debian.org/source/jessie/pdns-recursor

https://www.debian.org/security/2017/dsa-3763

Plugin Details

Severity: High

ID: 96496

File Name: debian_DSA-3763.nasl

Version: 3.8

Type: local

Agent: unix

Published: 1/16/2017

Updated: 1/11/2021

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: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/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: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:pdns-recursor

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/13/2017

Reference Information

CVE: CVE-2016-7068

DSA: 3763