Upstream information

CVE-2021-26720 at MITRE

Description

avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4.6
Vector AV:L/AC:L/Au:N/C:P/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.8 3.6
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Access Vector Local Local
Access Complexity Low High
Privileges Required Low Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High Low
Integrity Impact High Low
Availability Impact High None
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entries: 1180827 [RESOLVED / FIXED], 1180865 [IN_PROGRESS], 1181852 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Image SLES15-SP1-CHOST-BYOS-Azure
Image SLES15-SP1-CHOST-BYOS-EC2
Image SLES15-SP1-CHOST-BYOS-GCE
Image SLES15-SP2-CHOST-BYOS-Aliyun
Image SLES15-SP2-CHOST-BYOS-Azure
Image SLES15-SP2-CHOST-BYOS-EC2
Image SLES15-SP2-CHOST-BYOS-GCE
  • libavahi-client3 >= 0.7-3.6.1
  • libavahi-common3 >= 0.7-3.6.1
SUSE Linux Enterprise Module for Basesystem 15 SP2
  • 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-glib2 >= 0.7-3.6.1
  • avahi-lang >= 0.7-3.6.1
  • avahi-utils >= 0.7-3.6.1
  • libavahi-client3 >= 0.7-3.6.1
  • libavahi-client3-32bit >= 0.7-3.6.1
  • libavahi-common3 >= 0.7-3.6.1
  • libavahi-common3-32bit >= 0.7-3.6.1
  • libavahi-core7 >= 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-gobject0 >= 0.7-3.6.1
  • libavahi-ui-gtk3-0 >= 0.7-3.6.1
  • libavahi-ui0 >= 0.7-3.6.1
  • libdns_sd >= 0.7-3.6.1
  • libhowl0 >= 0.7-3.6.1
  • typelib-1_0-Avahi-0_6 >= 0.7-3.6.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP2-2021-551
SUSE Linux Enterprise Module for Desktop Applications 15 SP2
  • avahi >= 0.7-3.6.1
  • avahi-autoipd >= 0.7-3.6.1
  • avahi-glib2 >= 0.7-3.6.1
  • avahi-utils-gtk >= 0.7-3.6.1
  • libavahi-gobject-devel >= 0.7-3.6.1
Patchnames:
SUSE-SLE-Module-Desktop-Applications-15-SP2-2021-551
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2
  • avahi >= 0.7-3.6.1
  • avahi-glib2 >= 0.7-3.6.1
  • libavahi-glib1-32bit >= 0.7-3.6.1
  • libdns_sd-32bit >= 0.7-3.6.1
  • python3-avahi >= 0.7-3.6.1
  • python3-avahi-gtk >= 0.7-3.6.1
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-SP2-2021-551
SUSE Linux Enterprise Module for additional PackageHub packages 15 SP2
  • avahi >= 0.7-3.6.1
  • python3-avahi >= 0.7-3.6.1
Patchnames:
SUSE-SLE-Module-Packagehub-Subpackages-15-SP2-2021-551
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • avahi >= 0.6.32-32.12.2
  • avahi-glib2 >= 0.6.32-32.12.3
  • avahi-lang >= 0.6.32-32.12.2
  • avahi-utils >= 0.6.32-32.12.2
  • libavahi-client3 >= 0.6.32-32.12.2
  • libavahi-client3-32bit >= 0.6.32-32.12.2
  • libavahi-common3 >= 0.6.32-32.12.2
  • libavahi-common3-32bit >= 0.6.32-32.12.2
  • libavahi-core7 >= 0.6.32-32.12.2
  • libavahi-glib1 >= 0.6.32-32.12.3
  • libavahi-glib1-32bit >= 0.6.32-32.12.3
  • libdns_sd >= 0.6.32-32.12.2
  • libdns_sd-32bit >= 0.6.32-32.12.2
Patchnames:
SUSE-SLE-SERVER-12-SP5-2021-563
SUSE Linux Enterprise Software Development Kit 12 SP5
  • avahi >= 0.6.32-32.12.2
  • avahi-compat-howl-devel >= 0.6.32-32.12.2
  • avahi-compat-mDNSResponder-devel >= 0.6.32-32.12.2
  • avahi-glib2 >= 0.6.32-32.12.3
  • libavahi-devel >= 0.6.32-32.12.2
  • libavahi-glib-devel >= 0.6.32-32.12.3
  • libavahi-gobject-devel >= 0.6.32-32.12.3
  • libavahi-gobject0 >= 0.6.32-32.12.3
  • libavahi-ui-gtk3-0 >= 0.6.32-32.12.3
  • libavahi-ui0 >= 0.6.32-32.12.3
  • libhowl0 >= 0.6.32-32.12.2
  • python-avahi >= 0.6.32-32.12.2
  • typelib-1_0-Avahi-0_6 >= 0.6.32-32.12.3
Patchnames:
SUSE-SLE-SDK-12-SP5-2021-563
SUSE Linux Enterprise Workstation Extension 12 SP5
  • avahi-glib2 >= 0.6.32-32.12.3
  • libavahi-gobject0 >= 0.6.32-32.12.3
  • libavahi-ui-gtk3-0 >= 0.6.32-32.12.3
  • libavahi-ui0 >= 0.6.32-32.12.3
Patchnames:
SUSE-SLE-WE-12-SP5-2021-563
openSUSE Leap 15.2
  • avahi >= 0.7-lp152.3.6.1
  • avahi-32bit-debuginfo >= 0.7-lp152.3.6.1
  • avahi-autoipd >= 0.7-lp152.3.6.1
  • avahi-autoipd-debuginfo >= 0.7-lp152.3.6.1
  • avahi-compat-howl-devel >= 0.7-lp152.3.6.1
  • avahi-compat-mDNSResponder-devel >= 0.7-lp152.3.6.1
  • avahi-debuginfo >= 0.7-lp152.3.6.1
  • avahi-debugsource >= 0.7-lp152.3.6.1
  • avahi-glib2 >= 0.7-lp152.3.6.1
  • avahi-glib2-debugsource >= 0.7-lp152.3.6.1
  • avahi-lang >= 0.7-lp152.3.6.1
  • avahi-mono >= 0.7-lp152.3.6.1
  • avahi-qt4 >= 0.7-lp152.3.6.1
  • avahi-qt4-debugsource >= 0.7-lp152.3.6.1
  • avahi-utils >= 0.7-lp152.3.6.1
  • avahi-utils-debuginfo >= 0.7-lp152.3.6.1
  • avahi-utils-gtk >= 0.7-lp152.3.6.1
  • avahi-utils-gtk-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-client3 >= 0.7-lp152.3.6.1
  • libavahi-client3-32bit >= 0.7-lp152.3.6.1
  • libavahi-client3-32bit-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-client3-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-common3 >= 0.7-lp152.3.6.1
  • libavahi-common3-32bit >= 0.7-lp152.3.6.1
  • libavahi-common3-32bit-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-common3-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-core7 >= 0.7-lp152.3.6.1
  • libavahi-core7-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-devel >= 0.7-lp152.3.6.1
  • libavahi-glib-devel >= 0.7-lp152.3.6.1
  • libavahi-glib1 >= 0.7-lp152.3.6.1
  • libavahi-glib1-32bit >= 0.7-lp152.3.6.1
  • libavahi-glib1-32bit-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-glib1-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-gobject-devel >= 0.7-lp152.3.6.1
  • libavahi-gobject0 >= 0.7-lp152.3.6.1
  • libavahi-gobject0-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-qt4-1 >= 0.7-lp152.3.6.1
  • libavahi-qt4-1-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-qt4-devel >= 0.7-lp152.3.6.1
  • libavahi-ui-gtk3-0 >= 0.7-lp152.3.6.1
  • libavahi-ui-gtk3-0-debuginfo >= 0.7-lp152.3.6.1
  • libavahi-ui0 >= 0.7-lp152.3.6.1
  • libavahi-ui0-debuginfo >= 0.7-lp152.3.6.1
  • libdns_sd >= 0.7-lp152.3.6.1
  • libdns_sd-32bit >= 0.7-lp152.3.6.1
  • libdns_sd-32bit-debuginfo >= 0.7-lp152.3.6.1
  • libdns_sd-debuginfo >= 0.7-lp152.3.6.1
  • libhowl0 >= 0.7-lp152.3.6.1
  • libhowl0-debuginfo >= 0.7-lp152.3.6.1
  • python3-avahi >= 0.7-lp152.3.6.1
  • python3-avahi-gtk >= 0.7-lp152.3.6.1
  • typelib-1_0-Avahi-0_6 >= 0.7-lp152.3.6.1
Patchnames:
openSUSE-2021-370


First public cloud image revisions this CVE is fixed in:


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
HPE Helion OpenStack 8 avahi Released
SUSE CaaS Platform 4.0 avahi Released
SUSE Enterprise Storage 5 avahi Unsupported
SUSE Enterprise Storage 6 avahi Released
SUSE Linux Enterprise High Performance Computing 12 SP5 avahi Released
SUSE Linux Enterprise High Performance Computing 15 LTSS avahi In progress
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS avahi Released
SUSE Linux Enterprise Module for Basesystem 15 SP1 avahi Unsupported
SUSE Linux Enterprise Module for Basesystem 15 SP2 avahi Released
SUSE Linux Enterprise Module for Desktop Applications 15 SP1 avahi Unsupported
SUSE Linux Enterprise Module for Desktop Applications 15 SP2 avahi Released
SUSE Linux Enterprise Point of Service 11 SP3 avahi Released
SUSE Linux Enterprise Point of Service Image Server 12 avahi Released
SUSE Linux Enterprise Server 11 SP4 LTSS avahi Released
SUSE Linux Enterprise Server 12 SP2 BCL avahi Released
SUSE Linux Enterprise Server 12 SP2 ESPOS avahi Released
SUSE Linux Enterprise Server 12 SP2 LTSS avahi Released
SUSE Linux Enterprise Server 12 SP3 BCL avahi Released
SUSE Linux Enterprise Server 12 SP3 ESPOS avahi Released
SUSE Linux Enterprise Server 12 SP3 LTSS avahi Released
SUSE Linux Enterprise Server 12 SP4 ESPOS avahi Released
SUSE Linux Enterprise Server 12 SP4 LTSS avahi Released
SUSE Linux Enterprise Server 12 SP5 avahi Released
SUSE Linux Enterprise Server 15 LTSS avahi In progress
SUSE Linux Enterprise Server 15 SP1 Business Critical Linux avahi Released
SUSE Linux Enterprise Server 15 SP1 LTSS avahi Released
SUSE Linux Enterprise Server ESPOS 15 avahi In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP2 avahi Released
SUSE Linux Enterprise Server for SAP Applications 12 SP3 avahi Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4 avahi Released
SUSE Linux Enterprise Server for SAP Applications 12 SP5 avahi Released
SUSE Linux Enterprise Server for SAP Applications 15 avahi In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP1 avahi Released
SUSE Linux Enterprise Software Development Kit 12 SP5 avahi Released
SUSE Manager Proxy 4.0 avahi Released
SUSE Manager Retail Branch Server 4.0 avahi Released
SUSE Manager Server 4.0 avahi Released
SUSE OpenStack Cloud 7 avahi Released
SUSE OpenStack Cloud 8 avahi Released
SUSE OpenStack Cloud 9 avahi Released
SUSE OpenStack Cloud Crowbar 8 avahi Released
SUSE OpenStack Cloud Crowbar 9 avahi Released
SUSE Package Hub 15 avahi Unsupported