alert http $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET ACTIVEX Possible UserManager SelectServer method Buffer Overflow Attempt"; flow:to_client,established; content:"<OBJECT"; nocase; content:"classid"; nocase; distance:0; content:"CLSID"; nocase; distance:0; content:"E5D2CE27-5FA0-11D2-A666-204C4F4F5020"; nocase; distance:0; content:"SelectServer"; nocase; pcre:"/<OBJECT\s+[^>]*classid\s*=\s*[\x22\x27]?\s*clsid\s*\x3a\s*\x7B?\s*E5D2CE27-5FA0-11D2-A666-204C4F4F5020/si"; reference:url,exploit-db.com/exploits/16002/; classtype:web-application-attack; sid:2012218; rev:3; metadata:created_at 2011_01_21, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)