Is CVE-2022-40617 in the CISA KEV catalog?

No. CVE-2022-40617 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-40617?

CVE-2022-40617 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-40617?

CVE-2022-40617 has an EPSS score of 1.63% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-40617?

Upgrade strongswan on debian 11 to 5.9.1-1+deb11u3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2022-40617

HIGHEPSS 73th pctl

7.5

CVSS v3

NVD

Description

strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data.

CWE-400Resource Exhaustion

How to fix

Remediation Available

strongswanDebian

Fixed in:5.9.1-1+deb11u3CVE-2022-40617

Fixed in:5.9.8-1CVE-2022-40617

libstrongswanUbuntu

Fixed in:5.1.2-0ubuntu2.11+esm3USN-5651-2

Fixed in:5.3.5-1ubuntu3.8+esm3USN-5651-2

Fixed in:5.6.2-1ubuntu2.9USN-5651-1

Fixed in:5.8.2-1ubuntu3.5USN-5651-1

Fixed in:5.9.5-2ubuntu2.1USN-5651-1

strongswanUbuntu

Fixed in:5.1.2-0ubuntu2.11+esm3USN-5651-2

Fixed in:5.3.5-1ubuntu3.8+esm3USN-5651-2

Fixed in:5.6.2-1ubuntu2.9USN-5651-1

Fixed in:5.8.2-1ubuntu3.5USN-5651-1

Fixed in:5.9.5-2ubuntu2.1USN-5651-1

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 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

1.63%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	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 2025-05-06.