🛡️ CVE-2023-2422 — keycloak
Description
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.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability none.
Weakness class
CVE-2023-2422 is classified as CWE-295: Improper Certificate Validation. A TLS certificate is accepted without proper verification, so a man-in-the-middle can present their own.
Affected software
CVE-2023-2422 is recorded against 4 packages.
- keycloak
- openshift-container-platform
- org.keycloak:keycloak-services (fixed in 21.1.2)
- single-sign-on
Timeline and source
Published on 4 October 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
bugzilla.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
bugzilla.redhat.com
Details
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| keycloak | — | — |
| openshift-container-platform | — | — |
| org.keycloak:keycloak-services | — | 21.1.2 |
| single-sign-on | — | — |
References
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More CVE 2023 advisories
Browse all of CVE 2023 in the advisory index.
Site Security Check
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