Vulnerability identifier: #VU60556

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-46659

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MariaDB
Server applications / Database software

Vendor: MariaDB Foundation

Description

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

The vulnerability exists due to improper management of internal resources. The database does not recognize that SELECT_LEX::nest_level is local to each VIEW. A remote user execute a specially crafted statements and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MariaDB: 10.8.0, 10.7.0 - 10.7.1, 10.6.0 - 10.6.5, 10.5.0 - 10.5.13, 10.4.0 - 10.4.22, 10.3.0 - 10.3.32, 10.2.0 - 10.2.41

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External links
http://jira.mariadb.org/browse/MDEV-25631
http://mariadb.com/kb/en/security/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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