alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Vulnerable Java Version 18.0.x Detected"; flow:established,to_server; flowbits:set,ET.http.javaclient.vulnerable; http.user_agent; content:"Java/18.0."; threshold:type limit, count 2, seconds 300, track by_src; reference:url,www.oracle.com/java/technologies/javase/18u-relnotes.html; classtype:bad-unknown; sid:2038895; rev:3; metadata:affected_product Java, attack_target Client_Endpoint, created_at 2022_09_19, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2024_03_14;)