#VU63719 Input validation error in MariaDB - CVE-2021-46665

Vulnerability identifier: #VU63719

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/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-2021-46665

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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

Vendor: Debian

Description

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

The vulnerability exists due to incorrect used_tables expectations in the sql_parse.cc. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MariaDB: 10.2.0 - 10.2.42, 10.3.0 - 10.3.33, 10.4.0 - 10.4.23, 10.5.0 - 10.5.14, 10.6.0 - 10.6.6, 10.7.1 - 10.7.2

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External links
https://jira.mariadb.org/browse/MDEV-25636
https://security.netapp.com/advisory/ntap-20220221-0002/
https://bugzilla.redhat.com/show_bug.cgi?id=2050026

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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.