CVE-2021-43305 is a high-severity heap buffer overflow vulnerability affecting ClickHouse, specifically within its LZ4 compression codec when processing malicious queries. This flaw, similar to CVE-2021-43304, stems from a lack of bounds checking during copy operations, potentially allowing attackers to write beyond allocated memory. With a CVSS score of 8.8, it presents a significant risk (AV:N/AC:L/PR:L) for remote code execution, data compromise, and denial of service. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 21.10.2.15CPE matchmatch criteria | cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.