CVE-2023-3597

Keycloak: secondary factor bypass in step-up authentication

Severity Score

5.0

*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 Keycloak, where it does not correctly validate its client step-up authentication in org.keycloak.authentication. This flaw allows a remote user authenticated with a password to register a false second authentication factor along with an existing one and bypass authentication.

Se encontró una falla en Keycloak, donde no valida correctamente la autenticación incremental de su cliente en org.keycloak.authentication. Esta falla permite que un usuario remoto autenticado con una contraseña registre un segundo factor de autenticación falso junto con uno existente y omita la autenticación.

*Credits: Red Hat would like to thank Johannes Bergmann (Bosch) for reporting this issue.

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-07-10 CVE Reserved
2024-04-25 CVE Published
2024-12-27 CVE Updated
2025-04-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
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-2023-3597	2024-04-16
https://bugzilla.redhat.com/show_bug.cgi?id=2221760	2024-04-16
https://access.redhat.com/errata/RHSA-2024:1866	2024-12-27

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