Improper access control in Red Hat Single Sign-On 7.5

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

rh-sso7-keycloak (Red Hat package): before 15.0.2-3.redhat_00002.1.el7sso

Red Hat Single Sign-On: before 7.5.0

CPE2.3

• cpe:2.3:o:red_hat:rh-sso7-keycloak_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:*:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2021:5218

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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