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Debian DLA-3466-1 : avahi - LTS security update

medium Nessus Plugin ID 177492

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Synopsis

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

Description

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3466 advisory.

 - A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.
 (CVE-2021-3468)

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

Solution

Upgrade the avahi packages.

For Debian 10 buster, this problem has been fixed in version 0.7-4+deb10u3.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984938

https://security-tracker.debian.org/tracker/source-package/avahi

https://www.debian.org/lts/security/2023/dla-3466

https://security-tracker.debian.org/tracker/CVE-2021-3468

https://packages.debian.org/source/buster/avahi

Plugin Details

Severity: Medium

ID: 177492

File Name: debian_DLA-3466.nasl

Version: 1.0

Type: local

Agent: unix

Published: 6/22/2023

Updated: 6/22/2023

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2021-3468

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:avahi-autoipd, p-cpe:/a:debian:debian_linux:avahi-daemon, p-cpe:/a:debian:debian_linux:avahi-discover, p-cpe:/a:debian:debian_linux:avahi-dnsconfd, p-cpe:/a:debian:debian_linux:avahi-ui-utils, p-cpe:/a:debian:debian_linux:avahi-utils, p-cpe:/a:debian:debian_linux:gir1.2-avahi-0.6, p-cpe:/a:debian:debian_linux:libavahi-client-dev, p-cpe:/a:debian:debian_linux:libavahi-client3, p-cpe:/a:debian:debian_linux:libavahi-common-data, p-cpe:/a:debian:debian_linux:libavahi-common-dev, p-cpe:/a:debian:debian_linux:libavahi-common3, p-cpe:/a:debian:debian_linux:libavahi-compat-libdnssd-dev, p-cpe:/a:debian:debian_linux:libavahi-compat-libdnssd1, p-cpe:/a:debian:debian_linux:libavahi-core-dev, p-cpe:/a:debian:debian_linux:libavahi-core7, p-cpe:/a:debian:debian_linux:libavahi-glib-dev, p-cpe:/a:debian:debian_linux:libavahi-glib1, p-cpe:/a:debian:debian_linux:libavahi-gobject-dev, p-cpe:/a:debian:debian_linux:libavahi-gobject0, p-cpe:/a:debian:debian_linux:libavahi-ui-gtk3-0, p-cpe:/a:debian:debian_linux:libavahi-ui-gtk3-dev, p-cpe:/a:debian:debian_linux:python-avahi, cpe:/o:debian:debian_linux:10.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/21/2023

Vulnerability Publication Date: 6/2/2021

Reference Information

CVE: CVE-2021-3468