CVE-2023-2422: Keycloak: oauth client impersonation
First published: Fri Apr 28 2023(Updated: )
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 that possesses a proper certificate can authorize itself as any other client, therefore, access data that belongs to other clients.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| maven/org.keycloak:keycloak-services | <21.1.2 | 21.1.2 |
| Redhat Keycloak | ||
| Redhat Openshift Container Platform | =4.9 | |
| Redhat Openshift Container Platform | =4.10 | |
| Redhat Openshift Container Platform | =4.11 | |
| Redhat Openshift Container Platform | =4.12 | |
| Redhat Single Sign-on | =7.6 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| redhat/keycloak | <18.0 | 18.0 |
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Reference Links
- https://github.com/keycloak/keycloak/security/advisories/GHSA-3qh5-qqj2-c78f
- https://github.com/keycloak/keycloak/commit/5c6c55945a384bfd82e51283096204dcb6f63d91
- https://nvd.nist.gov/vuln/detail/CVE-2023-2422
- https://access.redhat.com/errata/RHSA-2023:3883
- https://access.redhat.com/errata/RHSA-2023:3884
- https://access.redhat.com/errata/RHSA-2023:3885
- https://access.redhat.com/errata/RHSA-2023:3888
- https://access.redhat.com/errata/RHSA-2023:3892
- https://access.redhat.com/security/cve/CVE-2023-2422
- https://bugzilla.redhat.com/show_bug.cgi?id=2191668
- https://github.com/advisories/GHSA-3qh5-qqj2-c78f (Advisory)
- https://access.redhat.com/security/cve/cve-2023-2422
Frequently Asked Questions
What is CVE-2023-2422?
CVE-2023-2422 is a vulnerability in Keycloak that allows a client with a proper certificate to authorize itself as any other client and access data belonging to other clients.
How severe is CVE-2023-2422?
CVE-2023-2422 has a severity rating of 7.1 (high).
Which software versions are affected by CVE-2023-2422?
CVE-2023-2422 affects Keycloak versions up to and excluding 21.1.2, as well as Redhat Keycloak versions up to and excluding 18.0.
How can I fix CVE-2023-2422?
To fix CVE-2023-2422, update your Keycloak server to version 21.1.2 or later, or update your Redhat Keycloak version to 18.0 or later.
Where can I find more information about CVE-2023-2422?
You can find more information about CVE-2023-2422 on the Keycloak security advisories page and the NVD website.
- collector/github-advisory-latest
- alias/GHSA-3qh5-qqj2-c78f
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