CVE-2021-43305

Name	CVE-2021-43305
Description	Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the LZ4::decompressImpl loop and especially the arbitrary copy operation wildCopy<copy_amount>(op, ip, copy_end), don’t exceed the destination buffer’s limits. This issue is very similar to CVE-2021-43304, but the vulnerable copy operation is in a different wildCopy call.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3176-1
Debian Bugs	1008216

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
clickhouse (PTS)	bullseye	18.16.1+ds-7.2+deb11u1	fixed
	bookworm	18.16.1+ds-7.3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
clickhouse	source	buster	18.16.1+ds-4+deb10u1	DLA-3176-1
clickhouse	source	bullseye	18.16.1+ds-7.2+deb11u1
clickhouse	source	(unstable)	18.16.1+ds-7.3		1008216

Notes

https://github.com/ClickHouse/ClickHouse/commit/2aea1c8d4a5be320365472052d8a48bf69fd9fe9 (v21.9.1.7685)
https://github.com/ClickHouse/ClickHouse/commit/6d83eacec42c7c403c99804a713a9d38caa4a45d (v21.9.1.7685)
https://github.com/ClickHouse/ClickHouse/pull/27136
https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms/