CVE-2021-43304
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.67% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 76.3% of scored records. A rank, not a probability.
- NVD base score
- 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2022-03-14 00:00Z4 YR AGO
- Last updated
- 2024-08-04 03:55Z2 YR AGO
- Reserved
- 2021-11-03
- Assigning CNA
- JFROG
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- e895d5078594f296d2bd1473f7090162e2f6c5c26cde4c3b434b8a44c51e8aa2
05 Affected products
06 References
- jfrog.comhttps://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms
- lists.debian.org[debian-lts-announce] 20221104 [SECURITY] [DLA 3176-1] clickhouse security updatehttps://lists.debian.org/debian-lts-announce/2022/11/msg00002.html
07 Fixed in
Debian 12
- clickhouse Fixed in 18.16.1+ds-7.3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.