[ASA-201902-27] elasticsearch: privilege escalation

[Morten Linderud]

Arch Linux Security Advisory ASA-201902-27
==========================================

Severity: High
Date    : 2019-02-25
CVE-ID  : CVE-2019-7611
Package : elasticsearch
Type    : privilege escalation
Remote  : Yes
Link    : https://security.archlinux.org/AVG-912

Summary
=======

The package elasticsearch before version 6.6.1-1 is vulnerable to
privilege escalation.

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.

Workaround
==========

None.

Description
===========

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.

Impact
======

An authenticated remote user can gain additional privileges on a index.

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
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