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AUSCERT External Security Bulletin Redistribution
ESB-2021.0674
Security update for avahi
24 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: avahi
Publisher: SUSE
Operating System: SUSE
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Create Arbitrary Files -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-26720
Original Bulletin:
https://www.suse.com/support/update/announcement/2021/suse-su-20210551-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than SUSE. It is recommended that administrators
running avahi check for an updated version of the software for their
operating system.
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SUSE Security Update: Security update for avahi
______________________________________________________________________________
Announcement ID: SUSE-SU-2021:0551-1
Rating: moderate
References: #1180827
Cross-References: CVE-2021-26720
Affected Products:
SUSE Linux Enterprise Module for Packagehub Subpackages 15-SP2
SUSE Linux Enterprise Module for Desktop Applications 15-SP2
SUSE Linux Enterprise Module for Basesystem 15-SP2
______________________________________________________________________________
An update that fixes one vulnerability is now available.
Description:
This update for avahi fixes the following issues:
o CVE-2021-26720: drop privileges when invoking avahi-daemon-check-dns.sh
(bsc#1180827)
o Update avahi-daemon-check-dns.sh from Debian. Our previous version relied
on ifconfig, route, and init.d.
o Add sudo to requires: used to drop privileges.
Patch Instructions:
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:
o SUSE Linux Enterprise Module for Packagehub Subpackages 15-SP2:
zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP2-2021-551=1
o SUSE Linux Enterprise Module for Desktop Applications 15-SP2:
zypper in -t patch SUSE-SLE-Module-Desktop-Applications-15-SP2-2021-551=1
o SUSE Linux Enterprise Module for Basesystem 15-SP2:
zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-551=1
Package List:
o SUSE Linux Enterprise Module for Packagehub Subpackages 15-SP2 (aarch64
ppc64le s390x x86_64):
avahi-debuginfo-0.7-3.6.1
avahi-debugsource-0.7-3.6.1
python3-avahi-0.7-3.6.1
o SUSE Linux Enterprise Module for Desktop Applications 15-SP2 (aarch64
ppc64le s390x x86_64):
avahi-autoipd-0.7-3.6.1
avahi-autoipd-debuginfo-0.7-3.6.1
avahi-debuginfo-0.7-3.6.1
avahi-debugsource-0.7-3.6.1
avahi-glib2-debugsource-0.7-3.6.1
avahi-utils-gtk-0.7-3.6.1
avahi-utils-gtk-debuginfo-0.7-3.6.1
libavahi-gobject-devel-0.7-3.6.1
o SUSE Linux Enterprise Module for Basesystem 15-SP2 (aarch64 ppc64le s390x
x86_64):
avahi-0.7-3.6.1
avahi-compat-howl-devel-0.7-3.6.1
avahi-compat-mDNSResponder-devel-0.7-3.6.1
avahi-debuginfo-0.7-3.6.1
avahi-debugsource-0.7-3.6.1
avahi-glib2-debugsource-0.7-3.6.1
avahi-utils-0.7-3.6.1
avahi-utils-debuginfo-0.7-3.6.1
libavahi-client3-0.7-3.6.1
libavahi-client3-debuginfo-0.7-3.6.1
libavahi-common3-0.7-3.6.1
libavahi-common3-debuginfo-0.7-3.6.1
libavahi-core7-0.7-3.6.1
libavahi-core7-debuginfo-0.7-3.6.1
libavahi-devel-0.7-3.6.1
libavahi-glib-devel-0.7-3.6.1
libavahi-glib1-0.7-3.6.1
libavahi-glib1-debuginfo-0.7-3.6.1
libavahi-gobject0-0.7-3.6.1
libavahi-gobject0-debuginfo-0.7-3.6.1
libavahi-ui-gtk3-0-0.7-3.6.1
libavahi-ui-gtk3-0-debuginfo-0.7-3.6.1
libavahi-ui0-0.7-3.6.1
libavahi-ui0-debuginfo-0.7-3.6.1
libdns_sd-0.7-3.6.1
libdns_sd-debuginfo-0.7-3.6.1
libhowl0-0.7-3.6.1
libhowl0-debuginfo-0.7-3.6.1
typelib-1_0-Avahi-0_6-0.7-3.6.1
o SUSE Linux Enterprise Module for Basesystem 15-SP2 (noarch):
avahi-lang-0.7-3.6.1
o SUSE Linux Enterprise Module for Basesystem 15-SP2 (x86_64):
avahi-32bit-debuginfo-0.7-3.6.1
libavahi-client3-32bit-0.7-3.6.1
libavahi-client3-32bit-debuginfo-0.7-3.6.1
libavahi-common3-32bit-0.7-3.6.1
libavahi-common3-32bit-debuginfo-0.7-3.6.1
References:
o https://www.suse.com/security/cve/CVE-2021-26720.html
o https://bugzilla.suse.com/1180827
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