Keycloak vulnerable to Improper Client Certificate Validation for OAuth/OpenID clients
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-2422US | high7.1 | — | ||
A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client t… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2023:3883WEB
- https://access.redhat.com/errata/RHSA-2023:3884WEB
- https://access.redhat.com/errata/RHSA-2023:3885WEB
- https://access.redhat.com/errata/RHSA-2023:3888WEB
- https://access.redhat.com/errata/RHSA-2023:3892WEB
- https://access.redhat.com/security/cve/CVE-2023-2422WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2191668WEB
- https://github.com/keycloak/keycloakPACKAGE
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