alert http any any -> [$HOME_NET,$HTTP_SERVERS] 8983 (msg:"ET EXPLOIT Apache Solr RCE via Velocity Template M2 (CVE-2019-17558)"; flow:established,to_server; http.method; content:"GET"; bsize:3; http.uri; content:"/select"; nocase; endswith; content:"wt=velocity"; nocase; distance:0; content:"v.template=custom"; nocase; content:"v.template.custom="; nocase; fast_pattern; reference:url,www.exploit-db.com/exploits/48338; reference:cve,2019-17558; classtype:attempted-admin; sid:2034259; rev:1; metadata:attack_target Server, created_at 2021_10_27, cve CVE_2019_17558, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2023_04_06, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)