The Groovy scripting engine in Elasticsearch before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to bypass the sandbox protection mechanism and execute arbitrary shell commands via a crafted script.Referenceshttp://www.securityfocus.com/archive/1/534689/100/0/threadedhttp://packetstormsecurity.com/files/130784/ElasticSearch-Unauthenticated-Remote-Code-Execution.htmlhttps://access.redhat.com/errata/RHSA-2017:0868http://www.securityfocus.com/bid/72585http://www.elasticsearch.com/blog/elasticsearch-1-4-3-1-3-8-released/https://exchange.xforce.ibmcloud.com/vulnerabilities/100850http://packetstormsecurity.com/files/130368/Elasticsearch-1.3.7-1.4.2-Sandbox-Escape-Command-Execution.htmlhttps://www.elastic.co/community/security/