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GHSA-3qh5-qqj2-c78f

Keycloak vulnerable to Improper Client Certificate Validation for OAuth/OpenID clients

Source: GitHub Advisory Database (reviewed) High CVE-2023-2422

Packages

EcosystemPackageAffectedFixed in
Maven org.keycloak:keycloak-services < 21.1.2 21.1.2

Details

As written in the advisory (Markdown source, shown as plain text).

When a Keycloak server is configured to support mTLS authentication for OAuth/OpenID clients, it does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client and therefore access data that belongs to other clients.

References

External links from the advisory. They lead to third-party sites.