Division by zero in ClickHouse - CVE-2021-42389
Published: March 18, 2022
Vulnerability identifier: #VU61462
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-42389
CWE-ID: CWE-369
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ClickHouse
Affected software:
ClickHouse
ClickHouse
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the divide-by-zero issue in Delta compression codec when parsing a malicious query. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
How to mitigate CVE-2021-42389
Install updates from vendor's website.