cve/2023/CVE-2023-2422.md

### [CVE-2023-2422](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2422)
![](https://img.shields.io/static/v1?label=Product&message=RHEL-8%20based%20Middleware%20Containers&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Single%20Sign-On%207&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Single%20Sign-On%207.6%20for%20RHEL%207&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Single%20Sign-On%207.6%20for%20RHEL%208&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Single%20Sign-On%207.6%20for%20RHEL%209&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Improper%20Certificate%20Validation&color=brighgreen)

### Description

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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds