Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2021-3917

medium Nessus Plugin ID 260327

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - A flaw was found in the coreos-installer, where it writes the Ignition config to the target system with world-readable access permissions. This flaw allows a local attacker to have read access to potentially sensitive data. The highest threat from this vulnerability is to confidentiality. (CVE-2021-3917)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2021-3917

Plugin Details

Severity: Medium

ID: 260327

File Name: unpatched_CVE_2021_3917.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 9/2/2025

Updated: 9/4/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-3917

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:H/I:N/A:N

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:coreos-installer, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:coreos-installer-dracut, p-cpe:/a:centos:centos:coreos-installer-bootinfra, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:coreos-installer, p-cpe:/a:redhat:enterprise_linux:coreos-installer-bootinfra, p-cpe:/a:redhat:enterprise_linux:coreos-installer-dracut

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/18/2021

Reference Information

CVE: CVE-2021-3917