Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2002.582 -- Microsoft Security Bulletin MS02-061
Elevation of Privilege in SQL Server Web Tasks (Q316333)
17 October 2002
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft SQL Server 7.0
Microsoft SQL Server 2000
Microsoft Data Engine (MSDE) 1.0
Microsoft Desktop Engine (MSDE) 2000
Vendor: Microsoft
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
Increased Privileges
Access Required: Remote
Existing Account
Ref: ESB-2002.539
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----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-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business
hours which are GMT+10:00 (AEST). On call after hours
for member emergencies only.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBPa75Pyh9+71yA2DNAQE8eAP+L0pZJOoz3Dm1yHHu2ib2TWlwUGeZ5Pc1
oL3k9CxosJVBkEGHOdW7p3ewInOrz8RwkL1c/3KBdMd22Kp9ISdV7ADhzHjbF2+6
Rz37ysRjmObYmZGQz4an33dqv8l8JGJsYWu2q7iit8nJUr81HkT6e8RhNOkfGvws
aHTTn6UIstQ=
=PwP1
-----END PGP SIGNATURE-----