Is CVE-2020-27222 in the CISA KEV catalog?

No. CVE-2020-27222 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-27222?

CVE-2020-27222 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-27222?

CVE-2020-27222 has an EPSS score of 0.85% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2020-27222?

No published fix for CVE-2020-27222 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2020-27222

HIGH

7.5

CVSS v3

NVD

Description

In Eclipse Californium version 2.3.0 to 2.6.0, the certificate based (x509 and RPK) DTLS handshakes accidentally fails, because the DTLS server side sticks to a wrong internal state. That wrong internal state is set by a previous certificate based DTLS handshake failure with TLS parameter mismatch. The DTLS server side must be restarted to recover this. This allow clients to force a DoS.

CWE-372

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.85%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Vendor Advisory1

bugs.eclipse.org

Related Vulnerabilities

Other CWE-372 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-25735	Medium	6.5	5.5%	-	Fix
CVE-2023-31127	Critical	9.0	0.9%	-	Fix
CVE-2024-22590	Critical	9.1	0.6%	-	-
CVE-2023-4012	High	7.5	0.4%	-	Fix
CVE-2026-41388	Medium	6.5	0.3%	-	Fix
CVE-2023-36834	Medium	6.5	0.3%	-	-

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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.