CVE-2023-6544 Keycloak: authorization bypass

2024-04-2515:58:47

CWE-625

redhat

github.com

keycloak

authorization bypass

permissive regular expression

dynamic client registration

trusteddomain configuration

CVSS3

5.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

6.2

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.