Red Hat Product Errata RHSA-2021:2070 - Security Advisory
Issued:
2021-05-20
Updated:
2021-05-20

RHSA-2021:2070 - Security Advisory

Synopsis

Moderate: Red Hat Single Sign-On 7.4.7 security update

Type/Severity

Security Advisory: Moderate

Topic

A security update is now available for Red Hat Single Sign-On 7.4 from the Customer Portal.

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.

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):

  • netty: Information disclosure via the local system temporary directory (CVE-2021-21290)
  • netty: possible request smuggling in HTTP/2 due missing validation (CVE-2021-21295)
  • 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.

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).

Affected Products

  • Red Hat Single Sign-On Text-Only Advisories x86_64

Fixes

  • BZ - 1927028 - CVE-2021-21290 netty: Information disclosure via the local system temporary directory
  • BZ - 1933320 - CVE-2021-3424 keycloak: Internationalized domain name (IDN) homograph attack to impersonate users
  • BZ - 1937364 - CVE-2021-21295 netty: possible request smuggling in HTTP/2 due missing validation
  • BZ - 1941565 - CVE-2021-3461 keycloak: Backchannel logout not working when Principal Type is set to Attribute Name for external SAML IDP

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