CVE-2021-42391

Divide-by-zero in Clickhouse's Gorilla 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 v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

1.37% chance of exploitation in the next 30 days, 70th percentile

Published

2022-03-14

Updated

2024-08-04

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2021-42390
• CVE-2021-42392
• CVE-2021-42389
• CVE-2021-4242
• CVE-2021-42388
• CVE-2021-4245