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SUSE SLED15 / SLES15 Security Update : avahi (SUSE-SU-2021:0551-1)

high Nessus Plugin ID 146794

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for avahi fixes the following issues :

CVE-2021-26720: drop privileges when invoking avahi-daemon-check-dns.sh (bsc#1180827)

Update avahi-daemon-check-dns.sh from Debian. Our previous version relied on ifconfig, route, and init.d.

Add sudo to requires: used to drop privileges.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Packagehub Subpackages 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP2-2021-551=1

SUSE Linux Enterprise Module for Desktop Applications 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Desktop-Applications-15-SP2-2021-551=1

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-551=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1180827

https://www.suse.com/security/cve/CVE-2021-26720/

http://www.nessus.org/u?ff1b319e

Plugin Details

Severity: High

ID: 146794

File Name: suse_SU-2021-0551-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2/24/2021

Updated: 3/1/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-26720

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:libavahi-client3-32bit-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-core7-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-core7, p-cpe:/a:novell:suse_linux:libdns_sd, p-cpe:/a:novell:suse_linux:libavahi-gobject0, p-cpe:/a:novell:suse_linux:libavahi-glib1-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-gobject-devel, p-cpe:/a:novell:suse_linux:python3-avahi, p-cpe:/a:novell:suse_linux:libavahi-glib-devel, p-cpe:/a:novell:suse_linux:libavahi-gobject0-debuginfo, p-cpe:/a:novell:suse_linux:avahi-utils-gtk, p-cpe:/a:novell:suse_linux:avahi-autoipd, p-cpe:/a:novell:suse_linux:avahi-32bit-debuginfo, p-cpe:/a:novell:suse_linux:libdns_sd-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-client3-debuginfo, p-cpe:/a:novell:suse_linux:avahi-compat-howl-devel, p-cpe:/a:novell:suse_linux:avahi-glib2-debugsource, p-cpe:/a:novell:suse_linux:libavahi-ui-gtk3, p-cpe:/a:novell:suse_linux:libhowl0-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-glib1, p-cpe:/a:novell:suse_linux:avahi, p-cpe:/a:novell:suse_linux:avahi-debuginfo, p-cpe:/a:novell:suse_linux:libhowl0, p-cpe:/a:novell:suse_linux:libavahi-ui0-debuginfo, p-cpe:/a:novell:suse_linux:avahi-utils-debuginfo, p-cpe:/a:novell:suse_linux:typelib-1_0-avahi, p-cpe:/a:novell:suse_linux:avahi-compat-mdnsresponder-devel, p-cpe:/a:novell:suse_linux:libavahi-common3, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:avahi-autoipd-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-ui0, p-cpe:/a:novell:suse_linux:avahi-utils-gtk-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-common3-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-client3, p-cpe:/a:novell:suse_linux:libavahi-common3-32bit-debuginfo, p-cpe:/a:novell:suse_linux:libavahi-devel, p-cpe:/a:novell:suse_linux:libavahi-ui-gtk3-0-debuginfo, p-cpe:/a:novell:suse_linux:avahi-utils, p-cpe:/a:novell:suse_linux:avahi-debugsource

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/23/2021

Vulnerability Publication Date: 2/17/2021

Reference Information

CVE: CVE-2021-26720