RHSA-2023:7855HighCVSS 7.7

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.6 security update on RHEL 9

Published
December 14, 2023
Last Modified
August 4, 2026

🔗 CVE IDs covered (3)

CVE-2023-6563 →CVE-2023-6134 →CVE-2023-6291 →

📋 Description

CVE-2023-6134 — keycloak: reflected XSS via wildcard in OIDC redirect_uri CVE-2023-6291 — keycloak: redirect_uri validation bypass CVE-2023-6563 — keycloak: offline session token DoS

🎯 Affected products4

  • Red Hat Single Sign-On 7.6 for RHEL 9
  • rh-sso7-keycloak-0:18.0.11-2.redhat_00003.1.el9sso.noarch as a component of Red Hat Single Sign-On 7.6 for RHEL 9
  • rh-sso7-keycloak-0:18.0.11-2.redhat_00003.1.el9sso.src as a component of Red Hat Single Sign-On 7.6 for RHEL 9
  • rh-sso7-keycloak-server-0:18.0.11-2.redhat_00003.1.el9sso.noarch as a component of Red Hat Single Sign-On 7.6 for RHEL 9

✅ Remediation

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 Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: There are three main options to prevent exploitation: 1) If you are using a reverse proxy, block the consents URL. 2) This option is less effective: remove the consents application tab from the account console theme. 3) This option has a significant negative impact on end users: entirely disable offline user profiles.

🔗 References (6)