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CVE-2022-40617

HIGH
7.5
CVSS Score
Published: October 31, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 05:01 AM UTC
5 products affected across 5 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
14.0416.0418.0420.0422.04
Debian Linux· Debiandrupal
95%
10.011.0
Fedora· Fedora Projectrpm
95%
37
Network Security· Stormshield
95%
3.11.1 ≤ v < 3.11.204.3.1 ≤ v < 4.3.154.5.1 ≤ v < 4.6.0
Affected range stops below 3.11.20, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.6.0, so it looks safe — our inference, not a vendor statement
strongSwan· Strongswan
95%
v < 5.9.8
Affected range stops below 5.9.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J3GAYIOCSLU57C45CO4UE4IV4JZE4W3L/
Source: [email protected]
https://www.strongswan.org/blog/2022/10/03/strongswan-vulnerability-%28cve-2022-40617%29.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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