AlmaLinux 8 : avahi (ALSA-2023:7836)

medium Nessus Plugin ID 187028


The remote AlmaLinux host is missing one or more security updates.


The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2023:7836 advisory.

- A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.

- A vulnerability was found in Avahi, where a reachable assertion exists in avahi_dns_packet_append_record.

- A vulnerability was found in Avahi. A reachable assertion exists in the avahi_escape_label() function.

- A vulnerability was found in Avahi. A reachable assertion exists in the dbus_set_host_name function.

- A vulnerability was found in Avahi. A reachable assertion exists in the avahi_rdata_parse() function.

- A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name() function. (CVE-2023-38473)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 187028

File Name: alma_linux_ALSA-2023-7836.nasl

Version: 1.2

Type: local

Published: 12/15/2023

Updated: 12/21/2023

Supported Sensors: Nessus

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-3468


Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2023-38473

Vulnerability Information

CPE: p-cpe:/a:alma:linux:avahi, p-cpe:/a:alma:linux:avahi-autoipd, p-cpe:/a:alma:linux:avahi-compat-howl, p-cpe:/a:alma:linux:avahi-compat-howl-devel, p-cpe:/a:alma:linux:avahi-compat-libdns_sd, p-cpe:/a:alma:linux:avahi-compat-libdns_sd-devel, p-cpe:/a:alma:linux:avahi-devel, p-cpe:/a:alma:linux:avahi-glib, p-cpe:/a:alma:linux:avahi-glib-devel, p-cpe:/a:alma:linux:avahi-gobject, p-cpe:/a:alma:linux:avahi-gobject-devel, p-cpe:/a:alma:linux:avahi-libs, p-cpe:/a:alma:linux:avahi-tools, p-cpe:/a:alma:linux:avahi-ui, p-cpe:/a:alma:linux:avahi-ui-devel, p-cpe:/a:alma:linux:avahi-ui-gtk3, p-cpe:/a:alma:linux:python3-avahi, cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::highavailability, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::powertools, cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::supplementary

Required KB Items: Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2023

Vulnerability Publication Date: 6/2/2021

Reference Information

CVE: CVE-2021-3468, CVE-2023-38469, CVE-2023-38470, CVE-2023-38471, CVE-2023-38472, CVE-2023-38473

CWE: 617, 835