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SUSE: 2021:1845-1 Important: avahi DoS Infinite Loop Fix

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Calendar Grey June 3, 2021
Scroller Suse
SUSE Security Bulletin: Critical libcurl update addresses vulnerabilities with comprehensive patch guidelines.
An update that fixes two vulnerabilities is now available

Summary

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 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

Topics%20covered

Topics Covered

security advisory important doS suse infinite loop avahi

References

#1180827 #1184521

Cross- 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 (SUSE): 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

SUSE Linux Enterprise Server for SAP 15

SUSE Linux Enterprise Server 15-LTSS

SUSE Linux Enterprise High Performance Computing 15-LTSS

SUSE Linux Enterprise High Performance Computing 15-ESPOS

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2021:1845-1
Rating: important

Topics%20covered

Topics Covered

security advisory important doS suse infinite loop avahi

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