alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT Possible Zoom Client Auto-Join (CVE-2019-13450)"; flow:established,to_client; file_data; content:"localhost|3a|19421/launch?action=join&confno="; reference:url,medium.com/bugbountywriteup/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5; reference:cve,2019-13450; classtype:attempted-user; sid:2027696; rev:1; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2019_07_10, cve CVE_2019_13450, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)