CVE-2023-2422

Keycloak: oauth client impersonation

State: Published
Severity: 5.5 Medium
Published: Oct 4, 2023
Updated: Aug 2, 2024
Reserved: Apr 28, 2023

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.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N	redhat

Weaknesses

CWE-295 Improper Certificate Validation

Affected Products

Product	Versions
Red Hat Single Sign-On 7Red Hat
Red Hat Single Sign-On 7.6 for RHEL 7Red Hat	0:18.0.8-1.redhat_00001.1.el7sso and laterNot affected
Red Hat Single Sign-On 7.6 for RHEL 8Red Hat	0:18.0.8-1.redhat_00001.1.el8sso and laterNot affected
Red Hat Single Sign-On 7.6 for RHEL 9Red Hat	0:18.0.8-1.redhat_00001.1.el9sso and laterNot affected
RHEL-8 based Middleware ContainersRed Hat	7.6-24 and laterNot affected

References

RHSA-2023:3883vendor-advisory
RHSA-2023:3884vendor-advisory
RHSA-2023:3885vendor-advisory
RHSA-2023:3888vendor-advisory
RHSA-2023:3892vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-2422vdb-entry
RHBZ#2191668issue-tracking

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