CVE-2021-3502

avahi: Avahi is an implementation of the DNS Service Discovery and Multicast DNS specifications for Zero Configuration Netwo...

CVE-2021-3502 is fixed in 26 products on 1 platform, first by avahi-autoipd 0.8-5ubuntu4, released May 7, 2021. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0037
31st percentile

Avahi is an implementation of the DNS Service Discovery and Multicast DNS specifications for Zero Configuration Networking. It facilitates service discovery on a local network. Avahi and Avahi-aware applications allow you to plug your computer into a network and, with no configuration, view other people to chat with, view printers to print with, and find shared files on other computers. Security Fix(es): * avahi: Local DoS by event-busy-loop from writing long lines to /run/avahi-daemon/socket (CVE-2021-3468) * avahi: reachable assertion in avahi_s_host_name_resolver_start when trying to resolve badly-formatted hostnames (CVE-2021-3502) * avahi: avahi-daemon can be crashed via DBus (CVE-2023-1981) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes linked from the References section.

Where it's fixed

ProductFixed inFixReleased
Linux
avahi · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-autoipd · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 avahi-autoipd 0.8-5ubuntu4 May 7, 2021
avahi-compat-howl · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-compat-howl · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-compat-howl · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-compat-howl-devel · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-compat-howl-devel · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-compat-howl-devel · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-compat-libdns_sd · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-compat-libdns_sd · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-compat-libdns_sd · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-compat-libdns_sd-devel · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-compat-libdns_sd-devel · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-compat-libdns_sd-devel · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-daemon · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 avahi-daemon 0.8-5ubuntu4 May 7, 2021
avahi-devel · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-devel · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-devel · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-discover · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 avahi-discover 0.8-5ubuntu4 May 7, 2021
avahi-dnsconfd · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 avahi-dnsconfd 0.8-5ubuntu4 May 7, 2021
avahi-glib · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-glib · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-glib · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-glib-devel · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-glib-devel · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-glib-devel · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-libs · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-libs · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-libs · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-tools · RHEL 9 0:0.8-15.el9 RHSA-2023:6707 Nov 7, 2023
avahi-tools · almalinux 9 0.8-15.el9 ALSA-2023:6707 Nov 7, 2023
avahi-tools · ol 9 0:0.8-15.el9 ELSA-2023-6707 Nov 11, 2023
avahi-ui-utils · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 avahi-ui-utils 0.8-5ubuntu4 May 7, 2021
avahi-utils · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 avahi-utils 0.8-5ubuntu4 May 7, 2021
gir1.2-avahi-0.6 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 gir1.2-avahi-0.6 0.8-5ubuntu4 May 7, 2021
libavahi-client3 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-client3 0.8-5ubuntu4 May 7, 2021
libavahi-common-data · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-common-data 0.8-5ubuntu4 May 7, 2021
libavahi-common3 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-common3 0.8-5ubuntu4 May 7, 2021
libavahi-compat-libdnssd1 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-compat-libdnssd1 0.8-5ubuntu4 May 7, 2021
libavahi-core7 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-core7 0.8-5ubuntu4 May 7, 2021
libavahi-glib1 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-glib1 0.8-5ubuntu4 May 7, 2021
libavahi-gobject0 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-gobject0 0.8-5ubuntu4 May 7, 2021
libavahi-ui-gtk3-0 · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 libavahi-ui-gtk3-0 0.8-5ubuntu4 May 7, 2021
python3-avahi · Ubuntu 22.04.1 LTS (jammy) 0.8-5ubuntu4 python3-avahi 0.8-5ubuntu4 May 7, 2021

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