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CVE-2021-42387

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 存在缓冲区错误漏洞，该漏洞源于当解析恶意查询时，Clickhouse的LZ4压缩编解码器的堆越界读取。

AI Predicted 7.8 Difficulty: Moderate EPSS 1.57% · P75

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-42387

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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 upper bounds of the source of the copy operation.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Yandex ClickHouse 缓冲区错误漏洞
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 存在缓冲区错误漏洞，该漏洞源于当解析恶意查询时，Clickhouse的LZ4压缩编解码器的堆越界读取。
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-2021-42387

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III. Intelligence Information for CVE-2021-42387

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Mailing List Discussions for CVE-2021-42387 (1)

Security Blog Posts for CVE-2021-42387 (1)

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

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-2021-42391 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-125

V. Comments for CVE-2021-42387

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