#VU63853 Reachable Assertion in MariaDB - CVE-2021-46666

Vulnerability identifier: #VU63853

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46666

CWE-ID: CWE-617

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MariaDB
Operating systems & Components / Operating system package or component

Vendor: Debian

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to mishandling of a pushdown from a HAVING clause to a WHERE clause. A local user can perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MariaDB: 10.2.0 - 10.2.38, 10.3.0 - 10.3.29, 10.4.0 - 10.4.19, 10.5.0 - 10.5.10, 10.6.0 - 10.6.1

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External links
https://jira.mariadb.org/browse/MDEV-25635
https://security.netapp.com/advisory/ntap-20220221-0002/
https://mariadb.com/kb/en/security/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.