CVE-2021-42387

Publication date 14 March 2022

Last updated 7 August 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
clickhouse	24.04 LTS noble	Not affected
	23.10 mantic	Ignored
	23.04 lunar	Ignored
	21.10 impish	Ignored
	20.04 LTS focal	Fixed 18.16.1+ds-7ubuntu0.1
	16.04 LTS xenial	Ignored
	14.04 LTS trusty	Ignored

Severity score breakdown

Parameter	Value
Base score	8.1 · High
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References

Related Ubuntu Security Notices (USN)