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Fencer Vulns
high 7.5

CVE-2022-40617 json

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…

published 2022-10-31 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-43891

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

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.

Patch / fix

  • strongswan strongswan 5.9.8
  • stormshield stormshield_network_security 3.11.20, 4.3.15, 4.6.0
  • strongswan Debian 14, Debian 13, Debian 12 5.9.8-1

debian advisories DEBIAN-CVE-2022-40617

  • strongswan Ubuntu 18.04 LTS 5.6.2-1ubuntu2.9
  • strongswan Ubuntu 20.04 LTS 5.8.2-1ubuntu3.5
  • strongswan Ubuntu 22.04 LTS 5.9.5-2ubuntu2.1
  • strongswan Ubuntu Pro 14.04 LTS 5.1.2-0ubuntu2.11+esm3
  • strongswan Ubuntu Pro 16.04 LTS 5.3.5-1ubuntu3.8+esm3
  • strongswan Ubuntu Pro FIPS-updates 16.04 LTS 5.3.5-1ubuntu3.fips.3.8.6
  • strongswan Ubuntu Pro FIPS-updates 18.04 LTS 5.6.2-1ubuntu2.fips.2.9
  • strongswan Ubuntu Pro FIPS-updates 20.04 LTS 5.8.2-1ubuntu3.fips.3.5

ubuntu advisories UBUNTU-CVE-2022-40617

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • strongswan SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP4, SLE Module for Basesystem 15 SP4 +1 more 5.8.2-150400.19.3.3
  • strongswan SLES for SAP 12 SP5, SLES 12 SP5 5.1.3-26.23.1
  • strongswan SLE Workstation Extension 15 SP3, SLE Module for Package Hub 15 SP3, SLE Module for Basesystem 15 SP3 +1 more 5.8.2-150200.11.30.1

suse advisories SUSE-SU-2022:4197-1SUSE-SU-2022:4185-1SUSE-SU-2022:4159-1

  • strongswan Alpine 3.13 5.9.1-r2
  • strongswan Alpine 3.14 5.9.1-r3
  • strongswan Alpine 3.15 5.9.1-r4
  • strongswan Alpine 3.16 5.9.5-r2
  • strongswan Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 5.9.8-r0

alpine advisories ALPINE-CVE-2022-40617

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • strongswan CBL-Mariner 2.0 5.9.8-1

azure linux advisories AZL-11398

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • strongswan Arch Linux 5.9.8-1

arch linux advisories AVG-2814

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-40617 updated cvss 7.5

strongswan: DoS via crafted certificates URI

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

1.99% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.