CVE-2021-42388 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Reference

https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

8.1