CVE-2023-2422

MEDIUM

Redhat Keycloak < 21.1.2 - Improper Certificate Validation

Title source: rule

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.

References (7)

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2023:3883

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2023:3884

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2023:3885

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2023:3888

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2023:3892

[Vendor Advisory] https://access.redhat.com/security/cve/CVE-2023-2422

[Issue Tracking, Vendor Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=2191668

Scores

CVSS v3 5.5

EPSS 0.0029

EPSS Percentile 52.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Classification

CWE

CWE-295

Status published

Affected Products (7)

redhat/keycloak

redhat/openshift_container_platform

redhat/openshift_container_platform

redhat/openshift_container_platform

redhat/openshift_container_platform

redhat/single_sign-on

org.keycloak/keycloak-services < 21.1.2Maven

Timeline

Published Oct 04, 2023

Tracked Since Feb 18, 2026