Advisories for Maven/Org.apache.flink/Flink-Metrics-Core package

This advisory impacts flink-runtime.

A change introduced in Apache Flink (and released as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink if their Flink instance(s) are exposed.

When running a process with an enabled JMXReporter, with a port configured via metrics.reporter.reporter_name > .port, an attacker with local access to the machine and JMX port can execute a man-in-the-middle attack using a specially crafted request to rebind the JMXRMI registry to one under the attacker's control. This compromises any connection established to the process via JMX, allowing extraction of credentials and any other transferred data.