| Name | CVE-2021-43304 |
| Description | Heap 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3176-1 |
| Debian Bugs | 1008216 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| clickhouse (PTS) | buster | 18.16.1+ds-4 | vulnerable |
| buster (security) | 18.16.1+ds-4+deb10u1 | fixed | |
| bullseye | 18.16.1+ds-7.2+deb11u1 | fixed | |
| bookworm | 18.16.1+ds-7.3 | fixed | |
| sid | 18.16.1+ds-7.4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| clickhouse | source | buster | 18.16.1+ds-4+deb10u1 | DLA-3176-1 | ||
| clickhouse | source | bullseye | 18.16.1+ds-7.2+deb11u1 | |||
| clickhouse | source | (unstable) | 18.16.1+ds-7.3 | 1008216 |
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/