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1. SQL SERVER CONNECTION STRING USERNAME PASSWORD FULL
2. SQL SERVER CONNECTION STRING USERNAME PASSWORD WINDOWS

The connection string also specifies that the ServiceName attribute is “Print_Server” and that the server can be either the master or the slave of the connection. Here are some examples of valid server connection strings and their meaning: This is a very simple example but is very powerful, at least as far as SQL Server is concerned. Then all data access and manipulation is handled using stored procedures. In SQL Server this would entail creating a user who has execute permissions to stored procedures but who does not have select permissions to the tables. In addition to putting the connection string in a safe place, the username you use for the application should have minimum access rights to get the job done. This is one area where creativity will pay off. Read it on application start and save it in a variable. You could create a text file, and encrypt the connection string in this file. You can create a component that does nothing but return the connection string to a properly authenticated caller. You do have a few options, such as the web.config file in the Address Book example. The attacks were mitigated by patching IIS, but the fact remained that an incorrectly configured server could allow access to this file.ĭue the compiled nature of the Common Language Runtime and ASP.NET it is unlikely that these problems will follow you into the future, however, it is still recommended to leave all sensitive data out of the AS(x)X files in ASP.NET. Second, this file could be compromised using simple attacks. Its name and location were dictated by the architecture of ASP. In past versions of ASP, it was common to place the connection string in the Global.asa.

SQL SERVER CONNECTION STRING USERNAME PASSWORD FULL

The application would have to store the connection string in a variable in memory, which means that it would be contained within a full memory dump.ĭeveloping & Deploying … Connection Strings and Security

SQL SERVER CONNECTION STRING USERNAME PASSWORD WINDOWS

For the attacker to get the connection string, the attacker would need to dump the memory for the application, be it a Windows Service, Win32 application, or web-based application, and read through the memory dump looking for the connection string. However, it is much more difficult for the attacker.

In either case, troubleshooting the application is made a little bit harder as the connection string is not easily visible without decrypting the connection string to ensure that the connection string is correct, which would require a separate application.Įven with the connection string stored in the configuration file in an encrypted format, there is still a risk of an attacker getting the connection string. This automatic encryption of the connection string is a better method for the systems administrator because it does not require the systems administrator to use a separate application to encrypt the connection string. Securing the connection string could be done through a separate application that the systems administrator could use during the deployment process to encrypt the string, or the application could be configured to automatically encrypt the string the first time the application launches. The application would then load the encrypted value from the config file, decrypt the value, and then use the decrypted value as the connection string to connect to the database. The best way to secure the database connection string is to encrypt the value within the configuration file. In order to protect the database, you have to protect the connection string, so that if an attacker is able to get access to the files on the web server or application server, the attacker is not able to use the connection string to attack the database. When the connection strings are stored in plain text, they provide a wealth of information to an attacker, typically everything that an attacker would need to break into a database. This connection string is typically stored in plain text to make it easy to edit and easy to change as the application is moved from development, to QA, to staging, and to production. Typically, the connection string will be stored in a configuration file somewhere within the application or web server. to use to connect to the SQL Server instance. Denny Cherry, in Securing SQL Server (Third Edition), 2015 Protecting Your Connection StringsĪpplications use connection strings to identify the server instance and database to connect to and to determine what driver, login, etc.