alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"GPL WEB_CLIENT XMLHttpRequest attempt"; flow:to_client,established; content:"new XMLHttpRequest|28|"; content:"file|3A|//"; nocase; reference:bugtraq,4628; reference:cve,2002-0354; classtype:web-application-attack; sid:2101735; rev:8; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2010_09_23, deployment Perimeter, confidence Medium, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;)