CVE-2023-1664: redhat build_of_quarkus Improper Certificate Validation

Vulnerability summary

CVE-2023-1664 is a medium (CVSS 6.5) Improper Certificate Validation vulnerability in redhat build_of_quarkus. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.3% of scored vulnerabilities.

Timeline

1. 26-05-2023
   PublishedVulnerability first disclosed.
2. 15-01-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-295Improper Certificate ValidationThe product does not validate, or incorrectly validates, a certificate.