Is CVE-2021-4217 in the CISA KEV catalog?

No. CVE-2021-4217 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4217?

CVE-2021-4217 has a CVSS v3 base score of 3.3 (LOW).

What is the EPSS score for CVE-2021-4217?

CVE-2021-4217 has an EPSS score of 0.57% (43th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4217?

Upgrade unzip on ubuntu 14.04 to 6.0-9ubuntu1.6+esm1 or later.

CVE & CISA-KEV Catalog

CVE-2021-4217

LOW

3.3

CVSS v3

NVD

Description

A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

unzipUbuntu

Fixed in:6.0-9ubuntu1.6+esm1USN-5673-1

Fixed in:6.0-20ubuntu1.1+esm1USN-5673-1

Fixed in:6.0-21ubuntu1.2USN-5673-1

Fixed in:6.0-25ubuntu1.1USN-5673-1

Fixed in:6.0-26ubuntu3.1USN-5673-1

Fixed in:6.0-28ubuntu4.1USN-7054-1

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

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.57%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Patch1

bugs.launchpad.net

Exploit1

bugzilla.redhat.com

Third-Party Advisory1

access.redhat.com

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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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.