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CVE-2021-43305

Published: 14 March 2022

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.

Priority

Medium

Cvss 3 Severity Score

8.8

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 8.8
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H