Elasticsearch 8.9.0, 7.17.13 Security Update

Elasticsearch uncontrolled resource consumption (ESA-2023-13)

An issue has been identified with how Elasticsearch handled incoming requests on the HTTP layer. An unauthenticated user could force an Elasticsearch node to exit with an OutOfMemory error by sending a moderate number of malformed HTTP requests.

The issue was identified by Elastic Engineering and we have no indication that the issue is known or that it is being exploited in the wild.

Affected Versions:
Elasticsearch versions up to 7.17.12 and from 8.0.0 up to 8.8.2

Elastic Cloud Enterprise up to versions 2.13.3 and 3.6.0, as these include Elasticsearch system clusters on affected versions.

Solutions and Mitigations:

Users should upgrade to Elasticsearch version 7.17.13 and 8.9.0 and higher.
Users should upgrade to Elastic Cloud Enterprise version 2.13.4 and 3.6.1

CVSSv3.1: 7.5 (High) AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE ID: CVE-2023-31418