Description
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.
Remediation
References
https://discuss.elastic.co/t/elastic-stack-6-6-1-and-5-6-15-security-update/169077
https://www.elastic.co/community/security
Related Vulnerabilities
CVE-2023-37579 Vulnerability in maven package org.apache.pulsar:pulsar-functions-worker
CVE-2017-1000388 Vulnerability in maven package org.jenkins-ci.plugins:depgraph-view
CVE-2012-5887 Vulnerability in maven package org.apache.tomcat:tomcat-catalina
CVE-2023-30428 Vulnerability in maven package org.apache.pulsar:pulsar-broker
CVE-2020-13942 Vulnerability in maven package org.apache.unomi:unomi-persistence-elasticsearch-core