inc microsoft sql server elevation of privilege vulnerability

Question

(inc microsoft sql server elevation of privilege vulnerability)

How to fix it why this vulnerabilities occurred, Latest patch applied on sql instance Recent saw this vulnerabilities on 2017,2019 and 2022 sql instances.

Answer 1

Make sure that you have the most recent CU/GDR for your SQL Server version installed.

That will protect you against the vulnerabilities that Microsoft has addressed. Apart from that, don't hand out power permissions to non-DBAs casually. There may be more ways to elevate permissions that has not been uncovered yet.

Answer 2

Elevation of privilege vulnerabilities in Microsoft SQL Server occur when the system improperly handles pointer casting, allowing an attacker with certain credentials to gain elevated privileges. This can lead to unauthorized access to view, change, or delete data, or create new accounts. The vulnerabilities have been documented in various security bulletins, including those for SQL Server versions 2017, 2019, and 2022.

To fix these vulnerabilities, it is essential to apply the latest security updates provided by Microsoft. The updates correct how SQL Server handles pointer casting, thus mitigating the risk associated with these vulnerabilities. Ensure that your SQL Server instances are configured to receive automatic updates, or manually check for updates if automatic updating is not enabled.

For specific vulnerabilities, you can refer to the security bulletins that detail the issues and the corresponding patches that have been released. It's also recommended to regularly conduct vulnerability assessments to identify and address security issues in your SQL Server environment.

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References:

• Microsoft Security Bulletin MS16-136 - Important
• Microsoft Security Bulletin MS15-058 - Important
• Microsoft Security Bulletin MS14-044 - Important
• Vulnerability assessment for SQL Server