openSUSE Security Update: Security update for avahi
______________________________________________________________________________

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
______________________________________________________________________________

   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