Microsoft Security Bulletin MS02-061: Elevation of Privilege in SQL Server Web Tasks (Q316333)

2002-10-17T00:00:00
ID SECURITYVULNS:DOC:3647
Type securityvulns
Reporter Securityvulns
Modified 2002-10-17T00:00:00

Description

-----BEGIN PGP SIGNED MESSAGE-----


Title: Elevation of Privilege in SQL Server Web Tasks (Q316333) Released: 16 October 2002 Software: Microsoft SQL Server 7.0 and 2000 Impact: Elevation of privilege Max Risk: Critical Bulletin: MS02-061

Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS02-061.asp.


Issue:

SQL Server 7.0 and 2000 provide stored procedures which is a coll- ection of Transact-SQL statements stored under a name and processed as a group. One stored procedure, an extended stored procedure and weak permissions on a table combine to allow a low privileged user the ability to run, delete, insert or update web tasks.

An attacker who is able to authenticate to a SQL server could delete, insert or update all the web tasks created by other users. In addition, the attacker could run already created web tasks in the context of the creator of the web task. This typically runs in the context of the SQL Server Agent service account.

Mitigating Factors:

    • It is necessary to be an authenticated user of the SQL Server.
    • Exploiting this vulnerability could allow the attacker to escalate privileges to the level of the SQL Server service account. By default, the service runs with the privileges of a domain user, rather than with system privileges.
    • Web tasks have to exist in the first place.

Risk Rating:

  • Internet systems: Critical
  • Intranet systems: Critical
  • Client systems: None

Patch Availability:

  • A patch is available to fix this vulnerability. Please read the Security Bulletin at http://www.microsoft.com/technet/security/bulletin/ms02-061.asp for information on obtaining this patch.

Acknowledgment:

  • Microsoft thanks David Litchfield of Next Generation Security Software Ltd. for reporting this issue to us and working with us to protect customers. We would also like to thank Martin Rakhmanoff (jimmers@yandex.ru) for contributing to the investigation.

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

-----BEGIN PGP SIGNATURE----- Version: PGP 7.1

iQEVAwUBPa3z6Y0ZSRQxA/UrAQFWOQf/YE4HJMZ7ez1BC9n3W2DRI9BpQVGw2s4N ALAcn2EprvU+jh4GUAuO9DilsNS/QjSsox6SFszjKJQih48xZTTXqnAocexC/8QV iK0x97xnqGA7+zgM7XGyKnUIOaEJZzTLyvY/qY5gmWZRTyqQsDrO+xUN3JecgPsU EYIkCINtLC51tRbFdK0NE3wlARcmamXFbkkm0ZeHh/ogh4pyLvXhHnabGPYMDuoB 2CDzOGpbMaI+PNRF2ZaVS4BlDfvR1jutizBQ9420HreFc7A6CWhu4WECtQzlHVNX r+WnaC3PidLv8tYAMFnHf7Y1hU/1w/l/R0MK2+oOn/JKsWnB7bgG1w== =FwnJ -----END PGP SIGNATURE-----


You have received this e-mail bulletin because of your subscription to the Microsoft Product Security Notification Service. For more information on this service, please visit http://www.microsoft.com/technet/security/notify.asp.

To verify the digital signature on this bulletin, please download our PGP key at http://www.microsoft.com/technet/security/notify.asp.

To unsubscribe from the Microsoft Security Notification Service, please visit the Microsoft Profile Center at http://register.microsoft.com/regsys/pic.asp

If you do not wish to use Microsoft Passport, you can unsubscribe from the Microsoft Security Notification Service via email as described below: Reply to this message with the word UNSUBSCRIBE in the Subject line.

For security-related information about Microsoft products, please visit the Microsoft Security Advisor web site at http://www.microsoft.com/security.