PT-2021-23613

CVE-2021-42391

Published

2021-10-18

Updated

2025-06-25

Description by

CVSS 3.1

6.5

Medium

MetricsAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions ClickHouse (affected versions not specified)

Description The issue is related to a divide-by-zero error in ClickHouse's Gorilla compression codec. This occurs when parsing a malicious query, where the first byte of the compressed buffer is used in a modulo operation without being checked for 0.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploitability

Exploit

Impacts

Researchers

Or Peles

Uriya Yavnieli

Vendors

Affected products

Weakness enumeration

CWE-369: Divide By Zero

Related identifiers