Amazon Linux 2 : avahi (ALAS-2020-1502)

critical Nessus Plugin ID 141943

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of avahi installed on the remote host is prior to 0.6.31-20. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2020-1502 advisory.

avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlapCVE-2015-2809. (CVE-2017-6519)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update avahi' to update your system.

Plugin Details

Severity: Critical

ID: 141943

File Name: al2_ALAS-2020-1502.nasl

Version: 1.5

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/27/2020

Updated: 12/17/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2017-6519

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:avahi-compat-libdns_sd-devel, p-cpe:/a:amazon:linux:avahi-devel, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:avahi-libs, p-cpe:/a:amazon:linux:avahi-glib, p-cpe:/a:amazon:linux:avahi-dnsconfd, p-cpe:/a:amazon:linux:avahi-debuginfo, p-cpe:/a:amazon:linux:avahi-compat-howl-devel, p-cpe:/a:amazon:linux:avahi-compat-libdns_sd, p-cpe:/a:amazon:linux:avahi-qt4, p-cpe:/a:amazon:linux:avahi-qt3, p-cpe:/a:amazon:linux:avahi-ui, p-cpe:/a:amazon:linux:avahi-qt3-devel, p-cpe:/a:amazon:linux:avahi-qt4-devel, p-cpe:/a:amazon:linux:avahi-gobject-devel, p-cpe:/a:amazon:linux:avahi-compat-howl, p-cpe:/a:amazon:linux:avahi-autoipd, p-cpe:/a:amazon:linux:avahi-tools, p-cpe:/a:amazon:linux:avahi-ui-gtk3, p-cpe:/a:amazon:linux:avahi-ui-tools, p-cpe:/a:amazon:linux:avahi-ui-devel, p-cpe:/a:amazon:linux:avahi-gobject, p-cpe:/a:amazon:linux:avahi-glib-devel, p-cpe:/a:amazon:linux:avahi

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/22/2020

Vulnerability Publication Date: 3/3/2015

Reference Information

CVE: CVE-2017-6519

BID: 73683, 106782

ALAS: 2020-1502

Detections

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