alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL WEB_CLIENT Microsoft ANI file parsing overflow"; flow:established,from_server; content:"RIFF"; nocase; content:"anih"; nocase; byte_test:4,>,36,0,relative,little; reference:cve,2004-1049; classtype:attempted-user; sid:2103079; rev:5; 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;)