In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.
{ "binaries": [ { "binary_name": "liblog4j2-java", "binary_version": "2.4-2ubuntu0.1~esm1" } ] }