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CVE-2021-42388

Published: 14 March 2022

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.

Priority

Medium

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package Release Status
clickhouse
Launchpad, Ubuntu, Debian
focal Needs triage

impish Ignored
(end of life)
lunar Ignored
(end of life, was needs-triage)
mantic Needs triage

upstream Needs triage

Severity score breakdown

Parameter Value
Base score 8.1
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