Microsoft SQL Elevation of Privilege Vulnerability

How can an attacker exploit this vulnerability? An authenticated attacker can send data over a network to an affected SQL Server when configured to run an Extended Event session.

There are GDR and/or CU (Cumulative Update) updates offered for my version of SQL Server. How do I know which update to use? First, determine your SQL Server version number. For more information on determining your SQL Server version number, see Microsoft Knowledge Base Article 321185 - How to determine the version, edition, and update level of SQL Server and its components. Second, in the table below, locate your version number or the version range that your version number falls within. The corresponding update is the one you need to install. Note If your SQL Server version number is not represented in the table below, your SQL Server version is no longer supported. Please upgrade to the latest Service Pack or SQL Server product in order to apply this and future security updates. Update number Title Apply if current product version is… This security update also includes servicing releases up through… 4583458 Security update for SQL Server 2019 RTM GDR: Jan 12, 2021 15.0.2000.5 - 15.0.2070.41 KB 4517790 - Previous SQL19 RTM GDR 4583459 Security update for SQL Server 2019 RTM CU8: Jan 12, 2021 15.0.4003.23 - 15.0.4073.23 KB 4577194 – SQL19 RTM CU8 4583456 Security update for SQL Server 2017 RTM GDR: Jan 12, 2021 14.0.1000.169 - 14.0.2027.2 KB4505224 - Previous SQL17 RTM GDR 4583457 Security update for SQL Server 2017 RTM CU22: Jan 12, 2021 14.0.3006.16 - 14.0.3356.20 KB4577467 – SQL17 RTM CU22 4583460 Security update for SQL Server 2016 Service Pack 2 (GDR): Jan 12, 2021 13.0.5026.0 - 13.0.5102.14 KB4532097 - Previous SQL16 SP2 GDR 4583461 Security update for SQL Server 2016 Service Pack 2 CU15: Jan 12, 2021 13.0.5149.0 - 13.0.5850.14 KB4577775 – SQL16 SP2 CU15 4583463 Security update for SQL Server 2014 Service Pack 3 (GDR): Jan 12, 2021 12.0.6024.0 - 12.0.6118.4 KB4532095 - Previous SQL14 SP3 GDR 4583462 Security update for SQL Server 2014 Service Pack 2 CU4: Jan 12, 2021 12.0.6205.1 - 12.0.6372.1 KB4535288 – SQL14 SP3 CU4 4583465 Security update for SQL Server 2012 Service Pack 4 (QFE): Jan 12, 2021 11.0.7001.0 - 11.0.7493.4 KB4532098 – Previous SQL12 SP4 QFE What are the GDR and CU update designations and how do they differ? The General Distribution Release (GDR) and Cumulative Update (CU) designations correspond to the two different servicing options in place for SQL Server baseline releases. A baseline can be either an RTM release or a Service Pack release. GDR updates – cumulatively only contain security updates for the given baseline. CU updates – cumulatively contain all functional fixes and security updates for the given baseline. For any given baseline, either the GDR or CU updates could be options (see below). If SQL Server installation is at a baseline version, you can choose either the GDR or CU update. If SQL Server installation has intentionally only installed past GDR updates, then choose to install the GDR update package. If SQL Server installation has intentionally installed previous CU updates, then chose to install the CU security update package. Note: You are allowed to make a change from GDR updates to CU updates ONE TIME. Once a SQL Server CU update is applied to a SQL Server installation, there is NO way to go back to the GDR update path. Can the security updates be applied to SQL Server instances on Windows Azure (IaaS)? Yes. SQL Server instances on Windows Azure (IaaS) can be offered the security updates through Microsoft Update, or customers can download the security updates from Microsoft Download Center and apply them manually.