Improper access control in Keycloak



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-4133
CWE-ID CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Keycloak
Server applications / Directory software, identity management

Vendor Keycloak

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper access control

EUVDB-ID: #VU59083

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-4133

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions within the administrative REST API. A remote user can bypass implemented security restrictions and create new default user accounts, even when new user registration is disabled.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Keycloak: 12.0.0 - 15.1.0

CPE2.3 External links

https://bugzilla.redhat.com/show_bug.cgi?id=2033602


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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