ArchLinux: 201902-27: elasticsearch: privilege escalation
Summary
A permission issue was found in Elasticsearch 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.
Resolution
Upgrade to 6.6.1-1.
# pacman -Syu "elasticsearch>=6.6.1-1"
The problem has been fixed upstream in version 6.6.1.
References
https://discuss.elastic.co/t/elastic-stack-6-6-1-and-5-6-15-security-update/169077 https://security.archlinux.org/CVE-2019-7611
Workaround
None.