alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Google Chrome Multiple Iframe PDF File Handling Memory Corruption Attempt"; flow:established,to_client; content:".pdf|22|><|2F|iframe>"; nocase; content:".pdf|22|><|2F|iframe>"; nocase; distance:0; content:".pdf|22|><|2F|iframe>"; nocase; distance:0; content:".pdf|22|><|2F|iframe>"; nocase; distance:0; content:".pdf|22|><|2F|iframe>"; nocase; distance:0; content:".pdf|22|><|2F|iframe>"; nocase; distance:0; reference:bid,49933; reference:cve,2011-2841; classtype:attempted-user; sid:2013742; rev:3; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_10_05, deployment Perimeter, confidence Medium, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;)