Improper certificate validation in Keycloak - CVE-2023-2422
Published: June 28, 2023
Vulnerability identifier: #VU77766
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-2422
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Keycloak
Affected software:
Keycloak
Keycloak
Detailed vulnerability description
The vulnerability allows a remote user to bypass authorization process.
The vulnerability exists due to improper certificate validation chain when a Keycloak server is configured to support mTLS authentication for OAuth/OpenID clients. A remote user that possesses a proper certificate can authorize itself as any other client and therefore access data that belongs to other clients.
How to mitigate CVE-2023-2422
Install updates from vendor's website.