GHSA-fj32-6v7m-57pg Improper Access Control in Elasticsearch

• Maven org.elasticsearch:elasticsearch: < 5.6.15 → fixed in 5.6.15 • Maven org.elasticsearch:elasticsearch: >= 6.0.0, < 6.6.1 → fixed in 6.6.1

A permission issue was found in Elasticsearch versions before 5.6.15 and 6.6.1 when Field Level Security and Document Level Security are disabled and the _aliases, _shrink, or _split endpoints are used . If the elasticsearch.yml file has xpack.security.dls_fls.enabled set to false, certain permission checks are skipped when users perform one of the actions mentioned above, to make existing data available under a new index/alias name. This could result in an attacker gaining additional permissions against a restricted index.