RHSA-2021:5219 - Security Advisory

Topic

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.

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.

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

Affected Products

• Red Hat Single Sign-On 7.5 for RHEL 8 x86_64

Fixes

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

CVEs

• CVE-2021-4133

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.5/