#Security Vulnerability

**I am running SQL Server on my system. What action do I need to take?** Update your relevant version of SQL Server. Any applicable driver fixes are included in those updates. **I am running my own application on my system. What action do I need to take?** Update your application to use Microsoft ODBC Driver 17 or 18 for SQL Server. Update the drivers to the versions listed on this page, which provide protection against this vulnerability. **I am running an application from a software vendor on my system. What action do I need to take?** Consult with your application vendor if it is compatible with Microsoft ODBC Driver 17 or 18 for SQL Server. Update the drivers to the versions listed in this page, which provide protection against this vulnerability **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 Serve...

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** An attacker could exploit the vulnerability by tricking an authenticated user (CVSS metric UI:R) into attempting to connect to a malicious SQL server via a connection driver (for example: ODBC and / or OLEDB as applicable).

**I am running SQL Server on my system. What action do I need to take?** Update your relevant version of SQL Server. Any applicable driver fixes are included in those updates. **I am running my own application on my system. What action do I need to take?** Update your application to use Microsoft OLE DB Driver 18 or 19. Update the drivers to the versions listed on this page, which provide protection against this vulnerability. **I am running an application from a software vendor on my system. What action do I need to take?** Consult with your application vendor if it is compatible with Microsoft OLE DB Driver 18 or 19. Update the drivers to the versions listed in this page, which provide protection against this vulnerability **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 Micr...

**According to the CVSS metric, the attack vector is network (AV:N) and the user interaction is required (UI:R). What is the target context of the remote code execution?** An authenticated victim who is connected to the network must be tricked or persuaded to connect to a malicious SQL database using their SQL client application. After the connection is made, the server can send specially crafted replies to the client that exploit the vulnerability and permit execution of arbitrary code within the context of the user's SQL client application.

**According to the CVSS metric, the attack vector is network (AV:N) and the user interaction is required (UI:R). What is the target context of the remote code execution?** An authenticated victim who is connected to the network must be tricked or persuaded to connect to a malicious SQL database using their SQL client application. After the connection is made, the server can send specially crafted replies to the client that exploit the vulnerability and permit execution of arbitrary code within the context of the user's SQL client application.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires multiple conditions to be met, such as specific application behavior, user actions, manipulation of parameters passed to a function, and impersonation of an integrity level token.

**How could an attacker exploit this vulnerability?** An attacker could exploit a DFS namespace (non-default) out-of-bound write vulnerability that results in heap corruption, which could then be used to perform arbitrary code execution on the server's dfssvc.exe process which runs as SYSTEM user.

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** An attacker could exploit the vulnerability by tricking an authenticated user (CVSS metric UI:R) into attempting to connect to a malicious SQL server via a connection driver (for example: ODBC and / or OLEDB as applicable).

**According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?** An attacker could exploit the vulnerability by tricking an authenticated user (CVSS metric UI:R) into attempting to connect to a malicious SQL server via a connection driver (for example: ODBC and / or OLEDB as applicable).

**What type of information could be disclosed by this vulnerability?** An attacker who successfully exploited this vulnerability could obtain sensitive API Keys.