| Name | CVE-2021-42391 |
| Description | Divide-by-zero in Clickhouse's Gorilla 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| clickhouse (PTS) | buster | 18.16.1+ds-4 | fixed |
| 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 | (unstable) | (not affected) | | | |
Notes
- clickhouse <not-affected> (Vulnerable code introduced later)
https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms/