CVE-2021-43304

HIGH
Published Mar 14, 20224y ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
High
Find Similar
Published Mar 14, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-122
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
clickhouseclickhouse* <21.10.2.15
debiandebian_linux10.0any

References 2

  • jfrog.com https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms
    ExploitThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/11/msg00002.html
    Mailing ListThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.