CVE-2023-2422

Keycloak: oauth client impersonation

CVSS 5.5 MEDIUMEPSS 0.5%CWE-295

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.5EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

04 Oct 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Affected products

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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References

https://access.redhat.com/errata/RHSA-2023:3883 https://access.redhat.com/errata/RHSA-2023:3884 https://access.redhat.com/errata/RHSA-2023:3885 https://access.redhat.com/errata/RHSA-2023:3888 https://access.redhat.com/errata/RHSA-2023:3892 https://access.redhat.com/security/cve/CVE-2023-2422 https://bugzilla.redhat.com/show_bug.cgi?id=2191668