Is CVE-2021-20319 in the CISA KEV catalog?

No. CVE-2021-20319 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20319?

CVE-2021-20319 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-20319?

CVE-2021-20319 has an EPSS score of 0.52% (40th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20319?

Upgrade coreos-installer to 0.10.1 or later.

CVE & CISA-KEV Catalog

CVE-2021-20319

HIGH

7.8

CVSS v3

NVD

Description

An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.

CWE-347

How to fix

Remediation Available

coreos-installerNVD

Affected:< 0.10.1Fixed in:0.10.1CVE-2021-20319derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.52%probability of exploitation in 30 days

40thpercentile

Moderate risk: more likely to be exploited than 40% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

bugzilla.redhat.com

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-347 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-16042	Medium	6.5	82%	-	-
CVE-2025-59718	Critical	9.8	66%	KEV	Fix
CVE-2025-25292	Critical	9.8	64%	-	Fix
CVE-2021-22160	Critical	9.8	53%	-	Fix
CVE-2013-3900	Medium	5.5	45%	KEV	-
CVE-2018-0114	High	7.5	43%	-	Fix

Embed a live status badge for CVE-2021-20319

Markdown

[![CVE-2021-20319](https://tridentstack.com/cve/badge/CVE-2021-20319.svg)](https://tridentstack.com/cve/CVE-2021-20319)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-20319"><img src="https://tridentstack.com/cve/badge/CVE-2021-20319.svg" alt="CVE-2021-20319"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.