Is CVE-2021-42373 in the CISA KEV catalog?

No. CVE-2021-42373 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42373?

CVE-2021-42373 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-42373?

CVE-2021-42373 has an EPSS score of 0.38% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42373?

Upgrade busybox on debian 12 to 1:1.35.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-42373

MEDIUM

5.5

CVSS v3

NVD

Description

A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

busyboxDebian

Fixed in:1:1.35.0-1CVE-2021-42373

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.38%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Third-Party Advisory2

Other references3

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.