What is CVE-2021-42390?

CVE-2021-42390 is a medium-severity vulnerability in Clickhouse, classified under Divide By Zero. CVSS score: 6.5/10. Published 2022-03-14.

How severe is CVE-2021-42390?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Clickhouse

CVE-2021-42390

Divide-by-zero in Clickhouse's DeltaDouble 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.

EPSS: 0.012 (66.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Clickhouse
Yandex Clickhouse — versions unspecified

Weakness classification (CWE)

CWE-369 — Divide By Zero

References

reefs@jfrog.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42390?: CVE-2021-42390 is a medium-severity vulnerability in Clickhouse, classified under Divide By Zero. CVSS score: 6.5/10. Published 2022-03-14.
How severe is CVE-2021-42390?: Medium severity. CVSS v3 base score is 6.5 out of 10.