RHSA-2023:7856 - Security Advisory

Topic

New Red Hat Single Sign-On 7.6.6 packages are now available for 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 7.6 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 7.6.6 on RHEL 8 serves as a replacement for Red Hat Single Sign-On 7.6.5, and includes bug fixes and enhancements.

Security Fix(es):

• keycloak: reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6291)
• keycloak: redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts (CVE-2023-6134)
• keycloak: offline session token DoS (CVE-2023-6563)

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 7.6 for RHEL 8 x86_64

Fixes

• BZ - 2249673 - CVE-2023-6134 keycloak: reflected XSS via wildcard in OIDC redirect_uri
• BZ - 2251407 - CVE-2023-6291 keycloak: redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts
• BZ - 2253308 - CVE-2023-6563 keycloak: offline session token DoS

CVEs

• CVE-2023-6134
• CVE-2023-6291
• CVE-2023-6563

References

• https://access.redhat.com/security/updates/classification/#important