#VU63850 Integer overflow in MariaDB - CVE-2021-46667

Vulnerability identifier: #VU63850

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-2021-46667

CWE-ID: CWE-190

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 attack.

The vulnerability exists due to integer overflow in the sql_lex.cc. A local user can pass specially crafted data to the application, trigger integer overflow and perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MariaDB: 10.2.0 - 10.2.40, 10.3.0 - 10.3.31, 10.4.0 - 10.4.21, 10.5.0 - 10.5.12, 10.6.0 - 10.6.4

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External links
https://jira.mariadb.org/browse/MDEV-26350
https://security.netapp.com/advisory/ntap-20220221-0002/
https://mariadb.com/kb/en/security/
https://bugzilla.redhat.com/show_bug.cgi?id=2050030

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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.