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 lower bounds of the source of the copy operation.
References (2)
Core 2
Core References
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/11/msg00002.html
Exploit, Third Party Advisory
https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms
Scores
CVSS v3
8.1
EPSS
0.0028
EPSS Percentile
51.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (2)
clickhouse/clickhouse
< 21.10.2.15
debian/debian_linux
10.0
Published
Mar 14, 2022
Tracked Since
Feb 18, 2026