RHEL 8 : avahi (RHSA-2023:7836)

medium Nessus Plugin ID 186930

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Synopsis

The remote Red Hat host is missing one or more security updates for avahi.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7836 advisory.

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_dns_packet_append_record (CVE-2023-38469)

* avahi: Reachable assertion in avahi_escape_label (CVE-2023-38470)

* avahi: Reachable assertion in dbus_set_host_name (CVE-2023-38471)

* avahi: Reachable assertion in avahi_rdata_parse (CVE-2023-38472)

* avahi: Reachable assertion in avahi_alternative_host_name (CVE-2023-38473)

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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Solution

Update the RHEL avahi package based on the guidance in RHSA-2023:7836.

Plugin Details

Severity: Medium

ID: 186930

File Name: redhat-RHSA-2023-7836.nasl

Version: 1.5

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 12/15/2023

Updated: 11/7/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

Vendor

Vendor Severity: Moderate

CVSS v2

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

CVSS v3

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:redhat:enterprise_linux:avahi-ui, p-cpe:/a:redhat:enterprise_linux:avahi-libs, p-cpe:/a:redhat:enterprise_linux:avahi-ui-devel, p-cpe:/a:redhat:enterprise_linux:avahi-compat-libdns_sd, p-cpe:/a:redhat:enterprise_linux:avahi-compat-howl, p-cpe:/a:redhat:enterprise_linux:avahi-tools, p-cpe:/a:redhat:enterprise_linux:avahi-gobject, p-cpe:/a:redhat:enterprise_linux:avahi-ui-gtk3, p-cpe:/a:redhat:enterprise_linux:avahi, p-cpe:/a:redhat:enterprise_linux:python3-avahi, p-cpe:/a:redhat:enterprise_linux:avahi-devel, p-cpe:/a:redhat:enterprise_linux:avahi-compat-howl-devel, p-cpe:/a:redhat:enterprise_linux:avahi-compat-libdns_sd-devel, p-cpe:/a:redhat:enterprise_linux:avahi-glib, p-cpe:/a:redhat:enterprise_linux:avahi-autoipd, p-cpe:/a:redhat:enterprise_linux:avahi-glib-devel, p-cpe:/a:redhat:enterprise_linux:avahi-gobject-devel, cpe:/o:redhat:enterprise_linux:8

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/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

RHSA: 2023:7836

Detections

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