CVE-2022-21724: Remote code execution vulnerability using plugin features

pgjdbc is the offical PostgreSQL JDBC Driver. A security hole was found in the jdbc driver for postgresql database while doing security research. The system using the postgresql library will be attacked when attacker control the jdbc url or properties. pgjdbc instantiates plugin instances based on class names provided via authenticationPluginClassName, sslhostnameverifier, socketFactory, sslfactory, sslpasswordcallback connection properties. However, the driver does not verify if the class implements the expected interface before instantiating the class. This can lead to remote code execution loaded via arbitrary classes.