Microsoft Data Access Components ODBC Buffer Overflow Vulnerability

Risk
High

Date Discovered
08-20-2003

Description
A buffer overflow vulnerability exists in Microsoft Data Access Components that may allow an attacker to run arbitrary code on a client machine. This vulnerability is exposed when a client or a SQL Server implementing the SQL-DMO library, sends a broadcast request for Microsoft SQL Servers on a network. In response an attacker could send malicious data to the querying system, causing a buffer overflow.

This vulnerability could allow an attacker to gain access to confidential data and compromise the system.

Platforms Affected
Microsoft Office 2000 SP2
Microsoft Office 2000 SR1
Microsoft SQL Server 7.0 SP2
Microsoft SQL Server 7.0 SP2 alpha
Microsoft SQL Server 7.0 SP3
Microsoft SQL Server 7.0 SP3 alpha
Microsoft SQL Server 2000
Microsoft SQL Server 2000 SP1
Microsoft SQL Server 2000 SP2
Microsoft SQL Server 2000 Desktop Engine
Microsoft Visual Studio .NET Academic Edition
Microsoft Visual Studio .NET Enterprise Architect Edition
Microsoft Visual Studio .NET Enterprise Developer Edition
Microsoft Visual Studio .NET Professional Edition
Microsoft Visual Studio .NET Trial Edition
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Server
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Server Japanese Edition
Microsoft Windows 2000 Terminal Services
Microsoft Windows 2000 Terminal Services SP1
Microsoft Windows 2000 Terminal Services SP2
Microsoft Windows XP
Microsoft Windows XP 64-bit Edition
Microsoft Windows XP Home
Microsoft Windows XP Professional

Components Affected
Microsoft MDAC 2.5 SP2
Microsoft MDAC 2.5 SP1
Microsoft MDAC 2.5 RTM
Microsoft MDAC 2.5
Microsoft MDAC 2.6 SP2
Microsoft MDAC 2.6 SP1
Microsoft MDAC 2.6 RTM
Microsoft MDAC 2.6
Microsoft MDAC 2.7 RTM Refresh
Microsoft MDAC 2.7

Recommendations
Block external access at the network boundary, unless service is required by external parties.
Restricting access to the network may prevent an attacker from listening to SQL requests from clients. If possible ensure that trusted sources have access to the internal network.

Microsoft has released a patch in order to address this issue.


Microsoft MDAC 2.5 SP2:

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

Microsoft Patch Q823718
http://www.microsoft.com/downloads/details.aspx?FamilyId=9107ABC6-8995-4A99-B6A0-478B3A847E9C&displaylang=en

References
Source: AppSecInc Security Alert: Buffer Overflow in UDP broadcasts for Microsoft SQL Se
URL: msg://bugtraq/008101c36816$59de0e80$f501a8c0@nycapt35k.com

Source: Microsoft Security Bulletin MS03-033
URL: http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS03-033.asp

Credits
The discovery of this vulnerability has been credited to "Aaron C. Newman" <aaron@newman-family.com>

Copyright (c) 2003 by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from symsecurity@symantec.com.

Disclaimer
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