Rule History

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET CURRENT_EVENTS Sophos PDF Standard Encryption Key Length Buffer Overflow"; flow:from_server,established; file_data; flowbits:isset,ET.pdf.in.http; content:"/Standard"; content:"/Length"; within:200; pcre:"/^[\r\n\s]+(\d{4}|(?!(\d{1,2}[\r\n\s]|1[0-2][0-8][\r\n\s])))((?!>>).)+\/R\s+3[\r\n\s>]/Rs"; classtype:trojan-activity; sid:2015866; rev:4; metadata:created_at 2012_11_06, confidence High, signature_severity Major, updated_at 2019_07_26;)