Packaging Permissions in Stored Procedures


application pool identity permissions event log

Symptoms. Website is inaccessible with the following error in the browser: CONFIG_TEXT: Service Unavailable. Application pool of a website is stopped. Here is what worked for me. Set the app pool identity to an account that can be assigned permissions to a folder. Ensure the source directory and all related files have been granted read rights to the files to the account assigned to the app pool identity property. By default, Farm administrators group has rights to manage all service applications. Often there are situations when you may need to add additional administrators or grant permissions to SharePoint service applications.

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Most recent update Copyright applies to this text. See here for font conventions used in this article. In this article you will learn you how you can package permissions for an action in SQL Server inside a stored procedure. That is, rather than granting the permissions the action requires directly to users and thereby permit them to do a lot more things they should not be allowed to, you grant them rights to run a stored procedure which performs this specific action but not more than that.

A simple example in an application is that far-reaching updates to a customer record should only be permitted for managers. An example from the DBA world is that you have power users who need be able to see who are connected to their database, but they must not see other users on the system.

The by far the most important and simplest to use of these is ownership chaining. In fact, it is so simple that you may not be aware of that you are using it. It is only for the extra special ones that we need to employ the other two methods. Application pool identity permissions event log serve the same purpose, but they do so in different ways.

Of the two, certificate signing is preferable in most cases. It may seem overly complex at first, application pool identity permissions event log we will learn how we can overcome that by automation. This article consists of two parts: the main article, which you are reading right now, and an appendix.

In the main article, you will learn to use these three techniques, for database-only permissions, for server-level permissions and application pool identity permissions event log cross-database access.

The appendix is an catalogue of examples that show how these techniques can be applied to specific problems. The main article is quite long. One reason for this is that I illustrate about everything I discuss with code samples and the output from the samples.

Another is that I have taken some space to highlight important security risks that you need to be aware of. You may have been referred to this article in response to a question that you need urgent help with.

For that situation, I would like to give some reading advice. Interlude: Access to the Database Only through the Application. This article contains a lot of code snippets. With the exception of a few snippets that are only for demonstrational purposes, the snippets are collected in scripts with about one script per chapter.

There are links to the scripts as they are needed, application pool identity permissions event log, and you can copy and paste from your browser to SSMS, if you like. You can also download this zip-archive which contains all scripts so that you have them locally.

This archive includes files both for the main article and the appendix. There is about one script per chapter. The names of the scripts reflect which chapter they belong to. Beware that the script for one chapter in the main article generally assumes that you have run the scripts for previous chapters, application pool identity permissions event log.

That is, databases, users, tables, stored procedures are reused. Thus, if you skip a chapter, you should still run the script for that chapter, but you can run all in one go. In the scripts, there are long lines of hyphens that delimit the snippets in the article, application pool identity permissions event log. In a few scripts there are also sections delimited by equal signs. They illustrate that you should change context to a different user or server as explained in the chapter, application pool identity permissions event log.

Since the scripts are supposed to be used with the article, they are largely uncommented. The download also includes some utility scripts that I don't include in whole in the text, but only discuss and drop a link to.

These scripts are commented. The code in this article creates quite a few things on your server: databases, logins, etc. Therefore, I recommend that you run the code on your private instance.

By all means, application pool identity permissions event log, do not run the code on a production server! I should also point out that I assume that when you run the scripts, you are logged in with sysadmin permission. After all, you are playing the server-level DBA. To produce the output from the scripts, I have been running SSMS set to Results to Text to make it easier to present both result sets and error messages.

When you run the scripts yourself, you may prefer to run with output to grid, but you will need to switch between the Results and Messages tabs to see all the output. At any time you feel that you don't want these objects around anymore, you can use the script CleanupAll. All databases created in this article includes the string Play in the name, which can help you to identify whether a database on your server may come from this article.

Moreover, check before you start playing whether you have databases with this string — in that case, you need to be careful. Later releases have brought us some smaller additions to these features. I will call these out when they appear. This is an article about security features, and therefore it is apt to start with some application pool identity permissions event log considerations on security.

There is no script for this chapter, and the snippets are not to be intended to be executed. Security is one of those difficult things, because it often conflicts with other interests in the programming trade. Users are screaming for a solution and they want it now, and at this point they don't worry about security, they only want to get their work done.

But if you provide them with a solution that has a security hole and that hole is later exploited by a rogue employee or an hacker from the outside, guess who will get the blame. Application pool identity permissions event log, you must always develop with security in mind. In on my point of view, security consists of multiple lines of defence, so if one line is broken, the intruders are stopped by the next line, or at least restricted in how much damage they can inflict. An important thing to keep in mind is that computer systems are not static, but typically they undergo a lot of changes during their lifetime, both in how they are configured and how the code is written.

If the system has a single line of defence, it only takes one bad programmer that makes a casual change to open a wide hole. Or one casual DBA to make a configuration change that takes down the line entirely. This is not the place to discuss all lines of defence you should have in place, but I will just give a quick list of some items:. You may object that in our application users need to be able to create tables, and Well, this article is exactly about that. How you can package privileged operations that go beyond the plain vanilla DML access in a stored procedure so that you don't have to grant users or application logins elevated permissions.

I want to highlight one specific security vulnerability and that is SQL injection, which is one of the most commonly exploited security holes. Here is a simple example in C :, application pool identity permissions event log. A malicious user can exploit this by entering something quite different from a customer name, for instance:. The key character is the single quote. The closing dashes comment out any remaining syntax in the original statement. Exactly what the user is able to do in the injected SQL depends on the next line of defence: that is, what permissions have been granted.

You may say to yourself: The user does not know what the SQL statement looks like, and it will take forever to figure out how to exploit a hole. Please remember that today hacking sites is a professional trade that pays well. These people have lot of time on their hands and good tooling to help them to trawl sites to find injection holes.

This is anything but a hypothetical threat, application pool identity permissions event log. That is, rather than building an SQL string from input, you use a parameterised statement which is a constant SQL string and which thus cannot be manipulated.

Not only is your code now safe from SQL injection, application pool identity permissions event log, but there are also a few pleasant side effects: 1 The plan cache in SQL Server is used more efficiently. This article is about stored procedures, and it is not uncommon to use in dynamic SQL in stored procedures. However, it only takes one junior developer who haven't grasped the concept, and suddenly you have something that looks like this:. And the exploit above is again possible, application pool identity permissions event log.

This is a theme I will return to more than once in this article to underscore why you should not grant more permissions than needed for the task. In some shops, particularly smaller ones, the same user s may be responsible for administer things on server level and database level.

However, this is far from always the case. In a application pool identity permissions event log corporation, an instance could have databases for different and unrelated department-level applications. At a hosting service, the databases could belong to customers who are unrelated to each other, or for that matter fierce competitors.

The staff who work as DBAs administer the server, but they are not much involved with the individual databases, but they are administered by application admins, the developers, or some other people. I have written this article with the latter scenario in mind, not because this is better than the first, application pool identity permissions event log, but simply because it presents more challenges. The terminology I have adopted is that I talk about the server-level Application pool identity permissions event log and the other group of people as local power users.

I often address you as the reader as if you are the server-level DBA. A recurring theme when we come to package server-level permissions in stored procedures is that you must be careful so that you don't introduce security holes that permit these local power users to elevate their permission to server level and become sysadmin.

This section is more a preparation for the rest of the article, although what you will learn here is something you can use in general. In this article we will run many commands as users with limited permissions to test whether permissions work or not.

You can say one of:. These statements make you become the user Lady Madonna for all practical matters. Thus, if you switched to another database while you were Lady Madonna, you need to switch back before you revert. But if any of the statements you perform as Lady Madonna fails, the batch may be aborted, in which case a REVERT statement at the end of the batch will not be executed. This can cause some confusion until you understand that you still are Lady Madonna.

When you use EXECUTE AS USER there can be some confusion, as you are sandboxed into the current database and cannot access other databases or perform actions that require server-level permissions — even if the user you impersonate has the permissions required. This is something we will look more into in further chapters in the article. That said, as long as you only want to test permissions inside the database, the two works equally well.


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application pool identity permissions event log


By default, Farm administrators group has rights to manage all service applications. Often there are situations when you may need to add additional administrators or grant permissions to SharePoint service applications. Introduction. Check Point Identity Collector is a Windows-based application which collects information about identities and their associated IP addresses, and sends it to the Check Point Security Gateways for identity enforcement. Mar 16,  · Since my last post about hosting Core on IIS I've gotten quite a few questions and comments in regards to working with this mixed IIS/Kestrel hosting environment. There are quite a few not so obvious arrangement in this set up and some surprising discoveries in terms of performance and segragation of feature usage between IIS and Kestrel.