CVE-2021-42387 is a high-severity heap out-of-bounds read vulnerability in ClickHouse's LZ4 compression codec, affecting various ClickHouse and Debian distributions. An authenticated attacker can trigger this by submitting a malicious query, leading to potential information disclosure and denial of service. While no public exploits or active exploitation have been observed, and community discussion is minimal, the vulnerability carries a CVSS score of 8.1.
| 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:N/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.