Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-42387

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 38.0%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 5.5
Products affected by CVE-2021-42387


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