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Denial of Service in Elasticsearch

Moderate severity GitHub Reviewed Published Aug 9, 2021 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

maven org.elasticsearch:elasticsearch (Maven)

Affected versions

< 6.8.17
>= 7.0.0-alpha1, < 7.13.3

Patched versions

6.8.17
7.13.3

Description

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

Published by the National Vulnerability Database Jul 26, 2021
Reviewed Aug 2, 2021
Published to the GitHub Advisory Database Aug 9, 2021
Last updated Jan 27, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Adjacent
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.138%
(50th percentile)

Weaknesses

CVE ID

CVE-2021-22144

GHSA ID

GHSA-3393-hvrj-w7v3

Source code

No known source code
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