alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"GPL WEB_SERVER unicode directory traversal attempt"; flow:established,to_server; http.uri.raw; content:"/..%255c.."; nocase; reference:bugtraq,1806; reference:cve,2000-0884; reference:nessus,10537; classtype:web-application-attack; sid:2101945; rev:11; metadata:created_at 2010_09_23, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, updated_at 2024_11_26, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1083, mitre_technique_name File_And_Directory_Discovery; target:dest_ip;)