alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT Javascript execution with expression eval"; flow:established,to_client; content:"string.fromcharcode"; nocase; pcre:"/expression[\s]*\([\s]*eval[\s]*\([\s]*String\.fromCharCode[\s]*\(([\s]*[\d]+[\s]*,){20}/i"; reference:url,www.securiteam.com/exploits/3D5Q4RFPPK.html; classtype:misc-activity; sid:2001105; rev:12; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag Web_Client_Attacks, updated_at 2024_03_07;)