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CVE-2021-42389

Published: Mar 14, 2022Updated: Jun 25, 2025 Sources: CVE List NVDCWE-369
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
1.2%
Top 34.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

Divide-by-zero in Clickhouse's Delta compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-369

Affected Products

clickhouseyandex
Mixed
Databases / data-warehouse-analytics
clickhouseclickhouse
On-prem
Databases / data-warehouse-analytics
yandexcommercialRUDatabasesaka clickhouse, yandex browser
clickhouseoss-projectDatabases

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms
jfrog.com

Timeline

Published
Mar 14, 2022
Last Updated
Jun 25, 2025

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