CVE-2023-6544

Keycloak: authorization bypass

Description

A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.

Remediation

Workaround:

  • No mitigation is currently available for this flaw.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.44%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22.0.10
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
Affected: Red Hat RHEL-8 based Middleware Containers
Affected: Red Hat RHSSO 7.6.8
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:1860 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1861 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1862 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1864 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1866 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1867 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1868 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-6544 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2253116 issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-6544?
CVE-2023-6544 has been scored as a medium severity vulnerability.
How to fix CVE-2023-6544?
As a workaround for remediating CVE-2023-6544: No mitigation is currently available for this flaw.
Is CVE-2023-6544 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6544 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6544?
CVE-2023-6544 affects Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22.0.10, Red Hat Red Hat Single Sign-On 7.6 for RHEL 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat Red Hat Single Sign-On 7.6 for RHEL 9, Red Hat RHEL-8 based Middleware Containers, Red Hat RHSSO 7.6.8.
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