alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SERVER ElasticSearch Directory Traversal Attempt (CVE-2015-3337)"; flow:to_server,established; http.uri.raw; content:"/_plugin/"; fast_pattern; pcre:"/(?:%2(?:52e(?:%2(?:52e(?:%(?:(?:25)?2|c0%a)f|\/)|e(?:%(?:(?:25)?2|c0%a)f|\/))|\.(?:%(?:(?:25)?2|c0%a)f|\/))|e(?:%2(?:52e(?:%(?:(?:25)?2|c0%a)f|\/)|e(?:%(?:(?:25)?2|c0%a)f|\/))|\.(?:%(?:(?:25)?2|c0%a)f|\/)))|\.(?:%2(?:52e(?:%(?:(?:25)?2|c0%a)f|\/)|e(?:%(?:(?:25)?2|c0%a)f|\/))|\.(?:%(?:(?:25)?2|c0%a)f|\/)))/Ri"; reference:cve,2015-3337; classtype:web-application-attack; sid:2021138; rev:6; metadata:created_at 2015_05_22, cve CVE_2015_3337, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, 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;)