CVE-2021-43304

NameCVE-2021-43304
DescriptionHeap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the LZ4::decompressImpl loop and especially the arbitrary copy operation wildCopy<copy_amount>(op, ip, copy_end), don’t exceed the destination buffer’s limits.
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)
ReferencesDLA-3176-1
Debian Bugs1008216

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
clickhouse (PTS)buster18.16.1+ds-4vulnerable
buster (security)18.16.1+ds-4+deb10u1fixed
bullseye18.16.1+ds-7.2vulnerable
bookworm, sid18.16.1+ds-7.3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
clickhousesourcebuster18.16.1+ds-4+deb10u1DLA-3176-1
clickhousesource(unstable)18.16.1+ds-7.31008216

Notes

[bullseye] - clickhouse <no-dsa> (Minor issue)
https://github.com/ClickHouse/ClickHouse/commit/2aea1c8d4a5be320365472052d8a48bf69fd9fe9 (v21.9.1.7685)
https://github.com/ClickHouse/ClickHouse/commit/6d83eacec42c7c403c99804a713a9d38caa4a45d (v21.9.1.7685)
https://github.com/ClickHouse/ClickHouse/pull/27136
https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms/

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