alert http $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT Mozilla Firefox Window.Open Document URI Spoofing Attempt"; flow:established,to_client; content:"window.open("; nocase; content:"setTimeout("; nocase; distance:0; content:"document.body.innerHTML"; nocase; distance:0; content:".stop"; nocase; distance:0; pcre:"/(window|w)\x2Estop/i"; reference:url,www.mozilla.org/security/announce/2010/mfsa2010-45.html; reference:url,bugzilla.mozilla.org/show_bug.cgi?id=556957; reference:cve,2010-1206; classtype:misc-attack; sid:2011240; rev:5; 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 2019_07_26;)