Elasticsearch memory disclosure issue (ESA-2021-16)

Summary

https://discuss.elastic.co/t/elasticsearch-7-13-4-security-update/279177

A memory disclosure vulnerability was identified in Elasticsearch’s error reporting. A user with the ability to submit arbitrary queries to Elasticsearch could submit a malformed query that would result in an error message returned containing previously used portions of a data buffer. This buffer could contain sensitive information such as Elasticsearch documents or authentication details.

Affected Versions:

Elasticsearch versions 7.10.0 to 7.13.3

Solutions and Mitigations:

Affected users should update their version of Elasticsearch to 7.13.4. There is no known workaround for this issue.

CVSSv3: 8.0 - AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE ID: CVE-2021-22145

CWE: CWE-125: Out-of-bounds Read

/cc @ironbank-notifications/bug