high
7.5
CWE
400
Advisory Published
Updated

CVE-2022-40617

First published: Mon Oct 31 2022(Updated: )

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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Strongswan Strongswan<5.9.8
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Canonical Ubuntu Linux=22.04
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Fedoraproject Fedora=37
Stormshield Stormshield Network Security>=3.11.1<3.11.20
Stormshield Stormshield Network Security>=4.3.1<4.3.15
Stormshield Stormshield Network Security>=4.5.1<4.6.0

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Reference Links

Frequently Asked Questions

  • What is CVE-2022-40617?

    CVE-2022-40617 is a vulnerability in strongSwan before 5.9.8 that allows remote attackers to cause a denial of service in the revocation plugin.

  • How does CVE-2022-40617 impact affected software?

    CVE-2022-40617 affects strongSwan versions before 5.9.8, as well as certain versions of Ubuntu Linux, Debian Linux, Fedora, and Stormshield Network Security.

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

    CVE-2022-40617 has a severity rating of 7.5 (high).

  • How can I fix CVE-2022-40617?

    To fix CVE-2022-40617, upgrade to strongSwan version 5.9.8 or later.

  • Where can I find more information about CVE-2022-40617?

    You can find more information about CVE-2022-40617 in the following references: [link1](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J3GAYIOCSLU57C45CO4UE4IV4JZE4W3L), [link2](https://www.strongswan.org/blog/2022/10/03/strongswan-vulnerability-(cve-2022-40617).html)

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