CVE-2023-6544

Keycloak: authorization bypass

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

Se encontró una falla en el paquete Keycloak. Este problema se produce debido a una expresión regular permisiva codificada para el filtrado que permite a los hosts registrar un cliente dinámico. Un usuario malintencionado con suficiente información sobre el entorno podría poner en peligro un entorno con este registro dinámico de cliente específico y esta configuración de TrustedDomain previamente no autorizada.

*Credits: Red Hat would like to thank Bastian Kanbach (Secure Systems DE [bastian.kanbach@securesystems.de]) for reporting this issue.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-12-06 CVE Reserved
2024-04-25 CVE Published
2024-04-26 EPSS Updated
2024-11-24 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-625: Permissive Regular Expression

CAPEC

References (9)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2024:1860	2024-04-25
https://access.redhat.com/errata/RHSA-2024:1861	2024-04-25
https://access.redhat.com/errata/RHSA-2024:1862	2024-04-25
https://access.redhat.com/errata/RHSA-2024:1864	2024-04-25
https://access.redhat.com/errata/RHSA-2024:1866	2024-04-25
https://access.redhat.com/errata/RHSA-2024:1867	2024-04-25
https://access.redhat.com/errata/RHSA-2024:1868	2024-04-25
https://access.redhat.com/security/cve/CVE-2023-6544	2024-04-16
https://bugzilla.redhat.com/show_bug.cgi?id=2253116	2024-04-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"		Build Keycloak Search vendor "Redhat" for product "Build Keycloak"				*		-		Affected
Redhat Search vendor "Redhat"		Red Hat Single Sign On Search vendor "Redhat" for product "Red Hat Single Sign On"				*		-		Affected
Redhat Search vendor "Redhat"		Rhosemc Search vendor "Redhat" for product "Rhosemc"				*		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				*		-		Affected