Debian DSA-3097-1 : unbound - security update

medium Nessus Plugin ID 79884

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Synopsis

The remote Debian host is missing a security-related update.

Description

Florian Maury from ANSSI discovered that unbound, a validating, recursive, and caching DNS resolver, was prone to a denial of service vulnerability. An attacker crafting a malicious zone and able to emit (or make emit) queries to the server can trick the resolver into following an endless series of delegations, leading to resource exhaustion and huge network usage.

Solution

Upgrade the unbound packages.

For the stable distribution (wheezy), this problem has been fixed in version 1.4.17-3+deb7u2.

For the upcoming stable distribution (jessie), this problem has been fixed in version 1.4.22-3.

Plugin Details

Severity: Medium

ID: 79884

File Name: debian_DSA-3097.nasl

Version: 1.11

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 12/15/2014

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, 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:N/A:P

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:unbound, 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: 12/10/2014

Reference Information

CVE: CVE-2014-8602

BID: 71589

DSA: 3097

Detections

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