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CVE-2023-2422

Good to know:

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Date: October 4, 2023

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.

Language: Java

Severity Score

Related Resources (12)

https://github.com/keycloak/keycloak/security/advisories/GHSA-3qh5-qqj2-c78f
https://bugzilla.redhat.com/show_bug.cgi?id=2191668
https://access.redhat.com/errata/RHSA-2023:3888
https://access.redhat.com/errata/RHSA-2023:3883
https://access.redhat.com/security/cve/CVE-2023-2422
https://access.redhat.com/errata/RHSA-2023:3885
https://nvd.nist.gov/vuln/detail/CVE-2023-2422
https://access.redhat.com/errata/RHSA-2023:3884
https://github.com/keycloak/keycloak/commit/5c6c55945a384bfd82e51283096204dcb6f63d91
https://access.redhat.com/errata/RHSA-2023:3892
https://github.com/keycloak/keycloak
https://www.mend.io/vulnerability-database/CVE-2023-2422

Severity Score

Weakness Type (CWE)

Improper Certificate Validation

CWE-295

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): LOW
Availability (A): NONE

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