FIX: A SQL Server login may have more permissions when you log on to an instance of SQL Server 2005

This article has been archived. It is offered "as is" and will no longer be updated.
Bug #: 155 (SQL Hotfix)

Microsoft distributes Microsoft SQL Server 2005 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2005 fix release.
This article describes the following about this hotfix release:
  • The issues that are fixed by this hotfix package
  • The prerequisites for installing the hotfix package
  • Whether you must restart the computer after you install the hotfix package
  • Whether the hotfix package is replaced by any other hotfix package
  • Whether you must make any registry changes
  • The files that are contained in the hotfix package
SYMPTOMS
Consider the following scenario. You create a SQL Server login, and then map a user to the login in a database (Database A). This login does not have permissions to access other databases. You log on to the instance of SQL Server by using the SQL Server login. In this scenario, the SQL Server login may have more permissions than when you created the login. This problem occurs if all the following conditions are true:
  • You set the TRUSTWORTHY option for Database A to ON.
  • Database A is trusted at server scope. By default, Database A is trusted at server scope because the dbo user is mapped to a member of the sysadmin fixed server role.
  • You run a module that is marked as EXECUTE AS 'user_name'. This user is mapped to the sa login.
  • The module includes a BACKUP statement.
For example, you can perform operations as a member of the sysadmin fixed server role in the execution context of the SQL Server login.
RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2005. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
913089 How to obtain the latest service pack for SQL Server 2005

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must have installed SQL Server 2005 to apply this hotfix.

Restart information

You do not have to restart the computer after you apply this hotfix.

Registry information

You do not have to change the registry.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain of all the files that you must have to fully update a product to the latest build.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
SQL Server 2005 32-bit version
File nameFile versionFile sizeDateTimePlatform
Msmdlocal.dll9.0.1518.015,585,49620-Jan-200609:11x86
Msmdredir.dll9.0.1518.03,927,25620-Jan-200609:11x86
Msxmlsql.dll2005.90.1518.0899,63820-Jan-200608:11x86
Osql.exe2005.90.1518.051,41620-Jan-200609:11x86
Sqlaccess.dll2005.90.1518.0349,40020-Jan-200609:11x86
Sqlservr.exe2005.90.1518.028,778,25620-Jan-200609:11x86
SQL Server 2005 x64-based version
File nameFile versionFile sizeDateTimePlatform
Msmdlocal.dll9.0.1518.015,585,49620-Jan-200609:11x86
Msmdredir.dll9.0.1518.03,927,25620-Jan-200609:11x86
Osql.exe2005.90.1518.083,67220-Jan-200613:14x64
Sqlaccess.dll2005.90.1518.0356,56820-Jan-200613:14x86
Sqlservr.exe2005.90.1518.039,397,59220-Jan-200613:14x64
SQL Server 2005 Itanium architecture version
File nameFile versionFile sizeDateTimePlatform
Msmdlocal.dll9.0.1518.048,416,98420-Jan-200612:30IA-64
Msmdredir.dll9.0.1518.06,072,53620-Jan-200612:31IA-64
Osql.exe2005.90.1518.0123,09620-Jan-200612:30IA-64
Sqlaccess.dll2005.90.1518.0351,44820-Jan-200612:30x86
Sqlservr.exe2005.90.1518.072,181,97620-Jan-200612:31IA-64
Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.

WORKAROUND
To work around this problem, restart the SQL Server service.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft SQL Server 2005 Service Pack 1.
REFERENCES
For more information about the naming schema for Microsoft SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 New naming schema for Microsoft SQL Server software update packages
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
For more information about the EXECUTE AS clause, see the following topics in SQL Server 2005 Books Online:
  • TRUSTWORTHY database property
  • ALTER DATABASE (Transact-SQL)
  • EXECUTE AS Clause (Transact-SQL)
  • Extending database impersonation by using EXECUTE AS
Properties

Article ID: 913941 - Last Review: 01/17/2015 13:17:29 - Revision: 2.0

  • Microsoft SQL Server 2005 Standard Edition
  • Microsoft SQL Server 2005 Developer Edition
  • Microsoft SQL Server 2005 Enterprise Edition
  • Microsoft SQL Server 2005 Express Edition
  • Microsoft SQL Server 2005 Express Edition with Advanced Services
  • Microsoft SQL Server 2005 Workgroup Edition
  • Microsoft SQL Server 2005 Enterprise Edition for Itanium-based Systems
  • Microsoft SQL Server 2005 Enterprise X64 Edition
  • Microsoft SQL Server 2005 Standard Edition for Itanium-based Systems
  • Microsoft SQL Server 2005 Standard X64 Edition
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