An avahi security update has been released for openSUSE Leap 15.3.

openSUSE-SU-2021:1845-1: important: Security update for avahi

openSUSE Security Update: Security update for avahi
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Announcement ID: openSUSE-SU-2021:1845-1
Rating: important
References: #1180827 #1184521
Cross-References: CVE-2021-26720 CVE-2021-3468
CVSS scores:
CVE-2021-26720 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-26720 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-3468 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVE-2021-3468 (SUSE): 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:
openSUSE Leap 15.3
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An update that fixes two vulnerabilities is now available.

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.

Patch Instructions:

To install this openSUSE 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:

- openSUSE Leap 15.3:

zypper in -t patch openSUSE-SLE-15.3-2021-1845=1


Package List:

- openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64):

python-avahi-0.6.32-5.13.1
python-avahi-gtk-0.6.32-5.13.1

References:

  https://www.suse.com/security/cve/CVE-2021-26720.html
  https://www.suse.com/security/cve/CVE-2021-3468.html
  https://bugzilla.suse.com/1180827
  https://bugzilla.suse.com/1184521