Medium severity · published Jul 26, 2021
CVE-2021-22144
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…
6.5
CVSS
2.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Elasticsearch · Elastic
before 6.8.17; 7.0.0 before 7.13.3 · source: NVD
CC
Communications Cloud Native Core Automated Test Suite · Oracle
1.8.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22144
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22144
Release Notes
https://discuss.elastic.co/t/elasticsearch-7-13-3-and-6-8-17-security-update/278100
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210827-0006/
Patch
https://www.oracle.com/security-alerts/cpuapr2022.html
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