alert tcp $EXTERNAL_NET any -> $HOME_NET 4000 (msg:"ET EXPLOIT SecurityGateway 1.0.1 Remote Buffer Overflow"; flow:to_server,established; content:"POST "; depth:5; nocase; content:"/SecurityGateway.dll"; nocase; distance:0; content:"logon"; nocase; distance:0; content:"&username"; nocase; distance:0; pcre:"/\x3d[^\x26]{720}/R"; reference:url,frsirt.com/english/advisories/2008/1717; reference:url,milw0rm.com/exploits/5718; reference:cve,2008-4193; classtype:misc-attack; sid:2008426; rev:4; metadata:created_at 2010_07_30, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)