Is CVE-2020-4320 in the CISA KEV catalog?

No. CVE-2020-4320 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-4320?

CVE-2020-4320 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2020-4320?

CVE-2020-4320 has an EPSS score of 0.79% (52th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-4320?

Upgrade mq to 8.0.0.15 or later.

CVE & CISA-KEV Catalog

CVE-2020-4320

MEDIUM

6.5

CVSS v3

NVD

Description

IBM MQ Appliance and IBM MQ AMQP Channels 8.0, 9.0 LTS, 9.1 LTS, and 9.1 CD do not correctly block or allow clients based on the certificate distinguished name SSLPEER setting. IBM X-Force ID: 177403.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

mqNVD

Affected:>= 8.0.0.0, < 8.0.0.15Fixed in:8.0.0.15CVE-2020-4320derived from NVD

Affected:>= 9.1.0, < 9.1.5Fixed in:9.1.5CVE-2020-4320derived from NVD

Affected:>= 9.1.0.0, < 9.1.0.5Fixed in:9.1.0.5CVE-2020-4320derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.79%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	83%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

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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.