#VU72224 Input validation error in Microsoft SQL Server - CVE-2023-21718

Vulnerability identifier: #VU72224

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-21718

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft SQL Server
Server applications / Database software

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SQL ODBC Driver. A remote attacker can trick the victim to connect to a malicious SQL server database via ODBC and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft SQL Server: 2014 CTP 1 11.0.9120.0 - 2014 CU18 12.0.5687.1, 2017 CTP 1 14.0.1.246 - 2017 CU31 14.0.3456.2, 2019 RC1 15.0.1900.25 - 2019 CU18 15.0.4261.1, 2022 RC0 16.0.900.6 - 2022 16.0.1000.6

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External links
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21718

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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.