CVE-2021-42387

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una lectura fuera de límites de la pila en el códec de compresión LZ4 de Clickhouse cuando es analizada una consulta maliciosa. Como parte del bucle LZ4::decompressImpl(), es leído un valor de 16 bits sin signo proporcionado por el usuario ("offset") de los datos comprimidos. El offset es usado posteriormente en la longitud de una operación de copia, sin comprobar los límites superiores del origen de la operación de copia

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-10-14 CVE Reserved
2022-03-14 CVE Published
2024-06-17 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (2)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/11/msg00002.html	Mailing List

URL	Date	SRC
https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Yandex Search vendor "Yandex"		Clickhouse Search vendor "Yandex" for product "Clickhouse"				< 21.10.2.15 Search vendor "Yandex" for product "Clickhouse" and version " < 21.10.2.15"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected