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Red Hat Security Advisory

Synopsis:          Moderate: Red Hat Single Sign-On 7.4.7 security update on RHEL 6
Advisory ID:       RHSA-2021:2063-01
Product:           Red Hat Single Sign-On
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2063
Issue date:        2021-05-20
CVE Names:         CVE-2021-3424 CVE-2021-3461
====================================================================
1. Summary:

New Red Hat Single Sign-On 7.4.7 packages are now available for Red Hat
Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 6 Server - noarch

3. Description:

Red Hat Single Sign-On 7.4 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 release of Red Hat Single Sign-On 7.4.7 serves as a replacement for
Red Hat Single Sign-On 7.4.6, and includes bug fixes and enhancements,
which are documented in the Release Notes document linked to in the
References.

Security Fix(es):

* keycloak: Backchannel logout not working when Principal Type is set to
Attribute Name for external SAML IDP (CVE-2021-3461)

* keycloak: Internationalized domain name (IDN) homograph attack to
impersonate users (CVE-2021-3424)

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/):

1933320 - CVE-2021-3424 keycloak: Internationalized domain name (IDN) homograph attack to impersonate users
1941565 - CVE-2021-3461 keycloak: Backchannel logout not working when Principal Type is set to Attribute Name for external SAML IDP

6. Package List:

Red Hat Single Sign-On 7.4 for RHEL 6 Server:

Source:
rh-sso7-keycloak-9.0.13-1.redhat_00006.1.el6sso.src.rpm

noarch:
rh-sso7-keycloak-9.0.13-1.redhat_00006.1.el6sso.noarch.rpm
rh-sso7-keycloak-server-9.0.13-1.redhat_00006.1.el6sso.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-2021-3424
https://access.redhat.com/security/cve/CVE-2021-3461
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.4/html/release_notes/index

8. 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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