#VU63672 Input validation error in MariaDB - CVE-2021-46661

Vulnerability identifier: #VU63672

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-46661

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application crash in find_field_in_tables and find_order_in_list via an unused common table expression (CTE). A remote attacker 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-25766
https://security.netapp.com/advisory/ntap-20220221-0002/
https://mariadb.com/kb/en/security/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NJ4KDAGF3H4D4BDTHRAM6ZEAJJWWMRUO/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DKJRBYJAQCOPHSED43A3HUPNKQLDTFGD/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EZFZVMJL5UDTOZMARLXQIMG3BTG6UNYW/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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