alert http any any -> [$HOME_NET,$HTTP_SERVERS] 8983 (msg:"ET EXPLOIT Apache Solr RCE via Velocity Template M1 (CVE-2019-17558)"; flow:established,to_server; http.method; content:"POST"; bsize:4; http.uri; content:"/solr/test/config"; nocase; endswith; http.request_body; content:"solr.VelocityResponseWriter"; nocase; fast_pattern; content:"params.resource.loader.enabled"; nocase; pcre:"/[^\r\n]*true/Ri"; reference:url,www.exploit-db.com/exploits/48338; reference:cve,2019-17558; classtype:attempted-admin; sid:2034258; 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 2021_10_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)