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CBL Mariner 2.0 Security Update: avahi (CVE-2021-26720)

high Nessus Plugin ID 201775

Synopsis

The remote CBL Mariner host is missing one or more security updates.

Description

The version of avahi installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-26720 advisory.

 - avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product. (CVE-2021-26720)

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

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2021-26720

Plugin Details

Severity: High

ID: 201775

File Name: mariner_CVE-2021-26720.nasl

Version: 1.1

Type: local

Published: 7/3/2024

Updated: 7/3/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2021-26720

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:cbl-mariner:avahi-gobject-devel, p-cpe:/a:microsoft:cbl-mariner:avahi-glib, p-cpe:/a:microsoft:cbl-mariner:avahi-compat-libdns_sd-devel, p-cpe:/a:microsoft:cbl-mariner:avahi-compat-libdns_sd, p-cpe:/a:microsoft:cbl-mariner:avahi-dnsconfd, p-cpe:/a:microsoft:cbl-mariner:avahi, p-cpe:/a:microsoft:cbl-mariner:avahi-devel, x-cpe:/o:microsoft:cbl-mariner, p-cpe:/a:microsoft:cbl-mariner:avahi-autoipd, p-cpe:/a:microsoft:cbl-mariner:avahi-debuginfo, p-cpe:/a:microsoft:cbl-mariner:avahi-glib-devel, p-cpe:/a:microsoft:cbl-mariner:avahi-gobject, p-cpe:/a:microsoft:cbl-mariner:avahi-tools, p-cpe:/a:microsoft:cbl-mariner:avahi-compat-howl-devel, p-cpe:/a:microsoft:cbl-mariner:avahi-libs, p-cpe:/a:microsoft:cbl-mariner:avahi-compat-howl

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/1/2024

Vulnerability Publication Date: 2/17/2021

Reference Information

CVE: CVE-2021-26720