ET WEB_SERVER Possible CVE-2015-1427 Elastic Search Sandbox Escape Remote Code Execution Attempt

alert tcp $EXTERNAL_NET any -> $HOME_NET [9200,9292] (
    msg:"ET WEB_SERVER Possible CVE-2015-1427 Elastic Search Sandbox Escape Remote Code Execution Attempt";
    flow:established,to_server;
    content:"POST /"; depth:6;
    content:"search"; distance:0;
    content:"script_fields"; distance:0; nocase;
    content:".class.forName"; nocase; distance:0;
    content:"java.lang.Runtime"; nocase; distance:0;
    reference:url,jordan-wright.github.io/blog/2015/03/08/elasticsearch-rce-vulnerability-cve-2015-1427;
    classtype:attempted-admin;
    sid:2020648; rev:2;
    metadata:created_at 2015_03_09, cve CVE_2015_1427, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)