DescriptionDivide-by-zero in Clickhouse's DeltaDouble 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
clickhouse (PTS)buster18.16.1+ds-4fixed
buster (security)18.16.1+ds-4+deb10u1fixed
bookworm, sid18.16.1+ds-7.3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
clickhousesource(unstable)(not affected)


- clickhouse <not-affected> (Vulnerable code introduced later)

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