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====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: Red Hat Single Sign-On 7.5.0 security update
Advisory ID:       RHSA-2021:5217-01
Product:           Red Hat Single Sign-On
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:5217
Issue date:        2021-12-20
CVE Names:         CVE-2021-4133
====================================================================
1. Summary:

A security update is now available for Red Hat Single Sign-On 7.5 from the
Customer Portal.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Description:

Red Hat Single Sign-On 7.5 is a standalone server, based on the Keycloak
project, that provides authentication and standards-based single sign-on
capabilities for web and mobile applications.

This is an asynchronous patch for Red Hat Single Sign-On 7.5, and includes
one security fix.

Security Fix:

* keycloak: Incorrect authorization allows unpriviledged users to create
other users (CVE-2021-4133)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

3. Solution:

Before applying the update, back up your existing installation, including
all applications, configuration files, databases and database settings, and
so on.

The References section of this erratum contains a download link (you must
log in to download the update).

4. Bugs fixed (https://bugzilla.redhat.com/):

2033602 - CVE-2021-4133 Keycloak: Incorrect authorization allows unpriviledged users to create other users

5. References:

https://access.redhat.com/security/cve/CVE-2021-4133
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?downloadType=securityPatches&product=core.service.rhsso&version=7.5
https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.5/

6. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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