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Several sources have recently released reports of ransomware attacks affecting MongoDB, Elasticsearch, Hadoop, and CouchDB instances. The attacks are targeting these platforms which are open to the Internet and use default configurations.
Regardless of which hosting provider you use, we strongly suggest that you follow security best practices to reduce your attack surface for MongoDB, Elasticsearch, Hadoop, and CouchDB. In addition, we recommend that customers regularly review all public-facing services and either reduce their network exposure or harden the applicable configuration.