CVE-2023-2422

2023-06-2618:48:09

redhat.com

access.redhat.com

keycloak

server

flaw

mtls

authentication

oauth

openid

clients

verify

client certificate chain

authorize

access data

7.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

36.6%

JSON

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.