CVE-2023-1664: Red Hat Build Of Quarkus

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in Keycloak. This flaw depends on a non-default configuration "Revalidate Client Certificate" to be enabled and the reverse proxy is not validating the certificate before Keycloak. Using this method an attacker may choose the certificate which will be validated by the server. If this happens and the KC_SPI_TRUSTSTORE_FILE_FILE variable is missing/misconfigured, any trustfile may be accepted with the logging information of "Cannot validate client certificate trust: Truststore not available". This may not impact availability as the attacker would have no access to the server, but consumer applications Integrity or Confidentiality may be impacted considering a possible access to them. Considering the environment is correctly set to use "Revalidate Client Certificate" this flaw is avoidable.

Affected products

• Red Hat Build Of Quarkus: affected versions not specified
• Red Hat JBoss A-Mq: version 7 only
• Red Hat Keycloak: affected versions not specified
• Red Hat Migration Toolkit For Runtimes: affected versions not specified
• Red Hat Single Sign-On: version 7.0 only

Published 2023-05-26. Last modified 2026-06-17.