alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Opera Window.Open document.cloneNode Null Pointer Deference Attempt"; flow:established,to_client; content:"window.open|28|"; nocase; content:"document.createElement|28|"; nocase; distance:0; content:"document.body.appendChild|28|"; nocase; distance:0; content:"close|28|"; nocase; distance:0; content:"document.cloneNode|28|"; nocase; distance:0; reference:url,www.exploit-db.com/exploits/16979/; classtype:attempted-user; sid:2012511; rev:3; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_03_16, deployment Perimeter, deprecation_reason Relevance, performance_impact Significant, signature_severity Major, tag Web_Client_Attacks, updated_at 2024_04_09;)