CVE-2021-43304
HIGH8.8EPSS 0.15%Published: 3/14/2022Modified: 4/28/2026
Also known as:DEBIAN-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.
Affected packages (1)
- Debian/clickhousefrom 0, < 18.16.1+ds-7.2+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |