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Fencer Vulns
medium 5.5

CVE-2023-1981 json

A vulnerability was found in the avahi library.

published 2023-05-26 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-24161

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

A vulnerability was found in the avahi library. This flaw allows an unprivileged user to make a dbus call, causing the avahi daemon to crash.

Patch / fix

  • avahi Debian 14, Debian 13, Debian 12 0.8-10

debian advisories DEBIAN-CVE-2023-1981

  • avahi Ubuntu 20.04 LTS 0.7-4ubuntu7.2
  • avahi Ubuntu 22.04 LTS 0.8-5ubuntu5.1
  • avahi Ubuntu Pro 14.04 LTS 0.6.31-4ubuntu1.3+esm2
  • avahi Ubuntu Pro 16.04 LTS 0.6.32~rc+dfsg-1ubuntu2.3+esm2
  • avahi Ubuntu Pro 18.04 LTS 0.7-3.1ubuntu1.3+esm1

ubuntu advisories UBUNTU-CVE-2023-1981

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • avahi RHEL 8 0.7-21.el8
  • avahi-ui RHEL 8 0.7-21.el8
  • avahi-glib RHEL 8 0.7-21.el8
  • avahi-libs RHEL 8 0.7-21.el8
  • avahi-tools RHEL 8 0.7-21.el8
  • avahi-autoipd RHEL 8 0.7-21.el8
  • avahi-gobject RHEL 8 0.7-21.el8
  • avahi-ui-gtk3 RHEL 8 0.7-21.el8

red hat advisories RHSA-2023:7190RHSA-2023:6707

  • avahi SLE Module for Package Hub 15 SP4, SLE Module for Desktop Applications 15 SP4, SLE Module for Basesystem 15 SP4 +4 more 0.8-150400.7.3.1
  • avahi-qt5 openSUSE Leap 15.4 0.8-150400.7.3.1
  • avahi-glib2 SLE Module for Desktop Applications 15 SP4, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 0.8-150400.7.3.1
  • avahi SLE Real Time 15 SP3, SLE Micro 5.2 0.7-150100.3.24.1
  • avahi-glib2 SLE Real Time 15 SP3, openSUSE Leap 15.4 0.7-150100.3.24.1
  • avahi SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 0.6.32-32.18.1
  • avahi-glib2 SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +1 more 0.6.32-32.18.1

suse advisories SUSE-SU-2023:1994-1SUSE-SU-2023:1993-1SUSE-SU-2023:1956-1

  • avahi openSUSE Tumbleweed 0.8-23.1

opensuse advisories openSUSE-SU-2024:12854-1

  • avahi AlmaLinux 8 0.7-21.el8
  • avahi-ui AlmaLinux 8 0.7-21.el8
  • avahi-glib AlmaLinux 8 0.7-21.el8
  • avahi-libs AlmaLinux 8 0.7-21.el8
  • avahi-tools AlmaLinux 8 0.7-21.el8
  • avahi-autoipd AlmaLinux 8 0.7-21.el8
  • avahi-gobject AlmaLinux 8 0.7-21.el8
  • avahi-ui-gtk3 AlmaLinux 8 0.7-21.el8

almalinux advisories ALSA-2023:7190ALSA-2023:6707

  • avahi Rocky Linux 8 0.7-21.el8

rocky linux advisories RLSA-2023:7190

  • avahi Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 0.8-r14

alpine advisories ALPINE-CVE-2023-1981

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • avahi CBL-Mariner 2.0 0.8-2
  • avahi Azure Linux 3.0 0.8-3

azure linux advisories AZL-26789AZL-34554

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-1981 updated cvss 6.2

avahi: avahi-daemon can be crashed via DBus

  • Red Hat Enterprise Linux 6 avahi, avahi-ui, avahi-qt3, avahi-qt4, avahi-glib, avahi-libs, +7 more Red Hat Enterprise Linux 7 avahi, avahi-ui, avahi-qt3, avahi-qt4, avahi-glib, avahi-libs, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) avahi-ui 0.7-21.el8, avahi-compat-howl 0.7-21.el8, avahi-compat-libdns_sd 0.7-21.el8
    fixed: vendor fix RHSA-2023:7190
  • Red Hat CodeReady Linux Builder (v. 9) avahi-compat-howl 0.8-15.el9, avahi-compat-libdns_sd 0.8-15.el9
    fixed: vendor fix RHSA-2023:6707
  • Red Hat Enterprise Linux AppStream (v. 8) avahi-tools 0.7-21.el8, avahi-ui-gtk3 0.7-21.el8
    fixed: vendor fix RHSA-2023:7190
  • Red Hat Enterprise Linux AppStream (v. 9) avahi-glib 0.8-15.el9, avahi-tools 0.8-15.el9
    fixed: vendor fix RHSA-2023:6707
  • Red Hat Enterprise Linux BaseOS (v. 8) avahi 0.7-21.el8, avahi-glib 0.7-21.el8, avahi-libs 0.7-21.el8, avahi-autoipd 0.7-21.el8, avahi-gobject 0.7-21.el8, python3-avahi 0.7-21.el8
    fixed: vendor fix RHSA-2023:7190
  • Red Hat Enterprise Linux BaseOS (v. 9) avahi 0.8-15.el9, avahi-libs 0.8-15.el9
    fixed: vendor fix RHSA-2023:6707

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/lathiat/avahi/issues/375 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • n/a avahi

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.