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.
{ "nvd_published_at": "2021-07-26T12:15:00Z", "cwe_ids": [ "CWE-674" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2021-08-02T19:21:25Z" }