CVE-2021-42389
MEDIUM
6.5
CVSS Score
Published: March 14, 2022 at 10:20 PM UTC
Updated: June 17, 2026 at 04:09 AM UTC
2 products affected across 2 vendorsClickHouseClickhouse
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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 21.10.2.15
Affected range stops below 21.10.2.15, so it looks safe — our inference, not a vendor statement
v < 21.10.2.15-stable
Affected range stops below 21.10.2.15-stable, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (1)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbmsCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-369
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