CVE-2021-42387

high

Description

Heap out-of-bounds read in Clickhouse's LZ4 compression codec when parsing a malicious query. As part of the LZ4::decompressImpl() loop, a 16-bit unsigned user-supplied value ('offset') is read from the compressed data. The offset is later used in the length of a copy operation, without checking the upper bounds of the source of the copy operation.

References

https://lists.debian.org/debian-lts-announce/2022/11/msg00002.html

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

Details

Source: Mitre, NVD

Published: 2022-03-14

Updated: 2022-12-03

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Severity: High