CVE-2023-1664
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.
How to fix
- org.keycloak:keycloak-core21.1.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat keycloak | No range specified | — |
| redhat build_of_quarkus | No range specified | — |
| redhat jboss_a-mq | 7 | — |
| redhat migration_toolkit_for_runtimes | No range specified | — |
| redhat single_sign-on | 7.0 | — |
| org.keycloak:keycloak-coreMaven | v < 21.1.2 | 21.1.2 |
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