A Red Hat Single Sign-On security update has been released for Red Hat Enterprise Linux 8.

RHSA-2021:5219-02: Important: Red Hat Single Sign-On security update on RHEL 8

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Red Hat Security Advisory

Synopsis: Important: Red Hat Single Sign-On security update on RHEL 8
Advisory ID: RHSA-2021:5219-01
Product: Red Hat Single Sign-On
Advisory URL:   https://access.redhat.com/errata/RHSA-2021:5219
Issue date: 2021-12-20
CVE Names: CVE-2021-4133
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1. Summary:

A security update is now available for Red Hat Single Sign-On 7.5 on Red
Hat Enterprise Linux 8.

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. Relevant releases/architectures:

Red Hat Single Sign-On 7.4 for RHEL 8 - noarch

3. 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.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

  https://access.redhat.com/articles/11258

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

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

6. Package List:

Red Hat Single Sign-On 7.4 for RHEL 8:

Source:
rh-sso7-keycloak-15.0.2-3.redhat_00002.1.el8sso.src.rpm

noarch:
rh-sso7-keycloak-15.0.2-3.redhat_00002.1.el8sso.noarch.rpm
rh-sso7-keycloak-server-15.0.2-3.redhat_00002.1.el8sso.noarch.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
  https://access.redhat.com/security/team/key/

7. References:

  https://access.redhat.com/security/cve/CVE-2021-4133
  https://access.redhat.com/security/updates/classification/#important
  https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.5/

8. Contact:

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

Copyright 2021 Red Hat, Inc.