CVE-2022-4967: High severity ubuntu/strongswan vulnerability
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).
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2022-4967?
CVE-2022-4967 has a medium severity due to the authorization bypass vulnerability.
How do I fix CVE-2022-4967?
To fix CVE-2022-4967, upgrade strongSwan to version 5.9.6 or a later version.
Which versions of strongSwan are affected by CVE-2022-4967?
strongSwan versions 5.9.2 through 5.9.5 are affected by CVE-2022-4967.
What type of vulnerability is CVE-2022-4967?
CVE-2022-4967 is an authorization bypass vulnerability caused by improper validation of certificates.
Does CVE-2022-4967 affect TLS-based EAP methods?
Yes, CVE-2022-4967 affects TLS-based EAP methods when certificates are used for client authentication.