alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED Adobe PDF CVE-2013-0640"; flow:from_server,established; flowbits:isset,ET.pdf.in.http; file_data; content:".keep.previous"; nocase; fast_pattern; content:".resolveNode"; nocase; pcre:"/^[\r\n\s]*?\\?\(.+?\\?\)\.keep\.previous[\r\n\s]*?=[\r\n\s]*?[\x22\x27]contentArea/Rsi"; reference:url,www.exploit-db.com/exploits/29881/; classtype:attempted-user; sid:2017790; rev:4; metadata:created_at 2013_11_30, signature_severity Unknown, tag CISA_KEV, updated_at 2022_07_08;)