strongSwan versions 5.9.2 through 5.9.5 are affected by authorization bypass through improper validation of certificate with host mismatch (CWE-297). When certificates are used to authenticate clients in TLS-based EAP methods, the IKE or EAP identity supplied by a client is not enforced to be contained in the client's certificate. So clients can authenticate with any trusted certificate and claim an arbitrary IKE/EAP identity as their own. This is problematic if the identity is used to make policy decisions. A fix was released in strongSwan version 5.9.6 in August 2022 (e4b4aabc4996fc61c37deab7858d07bc4d220136).

Canonical Ltd. AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Canonical Ltd. https://github.com/strongswan/strongswan/commit/e4b4aabc4996fc61c37deab7858d07bc4d220136 [No types assigned]

Canonical Ltd. https://www.cve.org/CVERecord?id=CVE-2022-4967 [No types assigned]

Canonical Ltd. https://www.strongswan.org/blog/2024/05/13/strongswan-vulnerability-(cve-2022-4967).html [No types assigned]