SUSE SLES15 Security Update : avahi (SUSE-SU-2021:1845-1)

high Nessus Plugin ID 150267

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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-2021-3468: avoid infinite loop by handling HUP event in client_work (bsc#1184521).

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 Server for SAP 15 :

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-2021-1845=1

SUSE Linux Enterprise Server 15-LTSS :

zypper in -t patch SUSE-SLE-Product-SLES-15-2021-1845=1

SUSE Linux Enterprise High Performance Computing 15-LTSS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2021-1845=1

SUSE Linux Enterprise High Performance Computing 15-ESPOS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2021-1845=1

See Also

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

https://bugzilla.suse.com/show_bug.cgi?id=1184521

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

https://www.suse.com/security/cve/CVE-2021-3468/

http://www.nessus.org/u?d812da1b

Plugin Details

Severity: High

ID: 150267

File Name: suse_SU-2021-1845-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 6/4/2021

Updated: 6/8/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

Temporal Vector: E:U/RL:OF/RC:C

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: E:U/RL:O/RC:C

Vulnerability Information

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

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: 6/3/2021

Vulnerability Publication Date: 2/17/2021

Reference Information

CVE: CVE-2021-26720, CVE-2021-3468