CVE-2022-40617: High severity strongSwan Strongswan vulnerability
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/strongswanto a version that resolves this vulnerability.Fixed in 5.9.8-5+deb12u5Fixed in 5.9.8-5+deb12u6Fixed in 6.0.1-6+deb13u6Fixed in 6.0.1-6+deb13u7Fixed in 6.1.0-2 - Upgrade
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alpine/strongswanto a version that resolves this vulnerability.Fixed in 5.9.1-r2 - Upgrade
Upgrade
alpine/strongswanto a version that resolves this vulnerability.Fixed in 5.9.1-r3 - Upgrade
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alpine/strongswanto a version that resolves this vulnerability.Fixed in 5.9.1-r4 - Upgrade
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alpine/strongswanto a version that resolves this vulnerability.Fixed in 5.9.5-r2 - Upgrade
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alpine/strongswanto a version that resolves this vulnerability.Fixed in 5.9.8-r0 - Upgrade
Upgrade
debian/strongswanto a version that resolves this vulnerability.Fixed in 5.9.8-1
Event History
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)