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CVE-2021-42391

Quick assessment

Affected
yandex clickhouse
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Yandex ClickHouse是俄罗斯Yandex公司的一套用于在线分析处理的开源列式数据库。 Yandex ClickHouse 存在数字错误漏洞，目前暂无该漏洞信息，请随时关注CNNVD或厂商公告。

AI Predicted 5.5 Difficulty: Easy EPSS 1.37% · P71

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-42391

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Divide-by-zero in Clickhouse's Gorilla compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
除零错误
Source: CVE Program / CVE List V5
Vulnerability Title
Yandex ClickHouse 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yandex ClickHouse是俄罗斯Yandex公司的一套用于在线分析处理的开源列式数据库。 Yandex ClickHouse 存在数字错误漏洞，目前暂无该漏洞信息，请随时关注CNNVD或厂商公告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
yandex clickhouse unspecified ~ 21.10.2.15-stable -

II. Public POCs for CVE-2021-42391

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-42391

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Security Blog Posts for CVE-2021-42391 (1)

Same Patch Batch · yandex · 2022-03-14 · 7 CVEs total

CVE-2021-42387 Yandex ClickHouse 缓冲区错误漏洞
CVE-2021-42388 Yandex ClickHouse 缓冲区错误漏洞
CVE-2021-42389 Yandex ClickHouse 数字错误漏洞
CVE-2021-42390 Yandex ClickHouse 数字错误漏洞
CVE-2021-43304 Yandex ClickHouse 缓冲区错误漏洞
CVE-2021-43305 Yandex ClickHouse 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: clickhouse
Same vendor: yandex
Same weakness: CWE-369

V. Comments for CVE-2021-42391

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