CVE-2023-2422

Keycloak: oauth client impersonation

Description

A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client, therefore, access data that belongs to other clients.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.22%
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 Single Sign-On 7
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
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2023:3883 vendor advisory
https://access.redhat.com/errata/RHSA-2023:3884 vendor advisory
https://access.redhat.com/errata/RHSA-2023:3885 vendor advisory
https://access.redhat.com/errata/RHSA-2023:3888 vendor advisory
https://access.redhat.com/errata/RHSA-2023:3892 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-2422 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2191668 vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-2422?
CVE-2023-2422 has been scored as a medium severity vulnerability.
How to fix CVE-2023-2422?
To fix CVE-2023-2422, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-2422 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-2422 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-2023-2422?
CVE-2023-2422 affects Red Hat Red Hat Single Sign-On 7, 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.
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