CVE-2021-22144: Uncontrolled Recursion

August 9, 2021 (updated August 31, 2021)

In Elasticsearch versions before 7.13.3 and 6.8.17 an uncontrolled recursion vulnerability that could lead to a denial of service attack was identified in the Elasticsearch Grok parser. A user with the ability to submit arbitrary queries to Elasticsearch could create a malicious Grok query that will crash the Elasticsearch node.

References

discuss.elastic.co/t/elasticsearch-7-13-3-and-6-8-17-security-update/278100
github.com/advisories/GHSA-3393-hvrj-w7v3
nvd.nist.gov/vuln/detail/CVE-2021-22144
security.netapp.com/advisory/ntap-20210827-0006/

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