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Category:   Application (Generic)  >   Windows Remote Desktop Vendors:   Microsoft
Windows Remote Desktop Client DLL Loading Error Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1025172
SecurityTracker URL:  http://securitytracker.com/id/1025172
CVE Reference:   CVE-2011-0029   (Links to External Site)
Date:  Mar 8 2011
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.2, 6.0, 6.1, 7.0
Description:   A vulnerability was reported in Windows Remote Desktop Client. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted DLL file on a remote share (e.g., WebDAV, SMB share). When the target user opens a valid Remote Desktop configuration file (.rdp) from the same directory as the DLL file, the application may load the remote user's DLL instead of the intended DLL and execute arbitrary code.

This type of exploit is also known as "binary planting" or "DLL preloading".

Eyal Gruner of Versafe Anti Fraud reported this vulnerability.

Impact:   A remote user can cause the target application to execute arbitrary code on the target user's system.
Solution:   The vendor has issued the following fixes:

Windows XP Service Pack 3, Remote Desktop Connection 5.2 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=1AED6080-FEAB-4B5E-9D26-6A3F4B92434D

Windows XP Service Pack 3, Remote Desktop Connection 6.1 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=D67E4D8C-AEB9-45E6-9555-7456C5540475

Windows XP Professional x64 Edition Service Pack 2, Remote Desktop Connection 6.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=6D4539EF-4A05-4C7D-9489-436F7B7A3EBE

Windows Server 2003 Service Pack 2, Remote Desktop Connection 6.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=641D5D12-0790-4551-831A-E78FEBAD17A7

Windows Server 2003 Service Pack 2, Remote Desktop Connection 6.0 Client Multilingual User Interface (MUI):

http://www.microsoft.com/downloads/details.aspx?familyid=6FEC0D06-042D-4E55-9843-009EDD7D26CE

Windows Server 2003 x64 Edition Service Pack 2, Remote Desktop Connection 6.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=78DBB9CF-8A18-4F0A-8EDF-F1CE0C993C63

Windows Vista Service Pack 1 and Windows Vista Service Pack 2, Remote Desktop Connection 6.1 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=E3EA7690-386B-4CDF-889F-B3914921C56F

Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2, Remote Desktop Connection 6.1 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=5735BED6-0E3D-46A4-85D0-14EC34A82EDD

Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2, Remote Desktop Connection 6.1 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=31D790C9-92F9-4A2B-800B-8E8D2B570BB9

Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2, Remote Desktop Connection 6.1 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=5B0A8EB5-4BC2-4054-B952-58AA645AFCF5

Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2, Remote Desktop Connection 6.1 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=25DA7E00-745D-4D98-9DD8-52A8A4340404

Windows XP Service Pack 3, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=6A01992E-C9A1-4DC9-A3EF-7410B81F17E6

Windows Vista Service Pack 1 and Windows Vista Service Pack 2, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=3C30F67E-7C31-4553-BA3E-E056DF1BF8EB

Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=8025482B-F58F-4F5A-A133-5563C65B21F6

Windows 7 for 32-bit Systems, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=0768A5F4-DA28-4B2E-8AFF-D68F890DF3E6

Windows 7 for x64-based Systems, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=935ADB10-1E7E-4501-B543-8247B88F6D18

Windows Server 2008 R2 for x64-based Systems, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=3FCB2E11-591E-484A-A992-2F1D563E6D17

Windows Server 2008 R2 for Itanium-based Systems, Remote Desktop Connection 7.0 Client:

http://www.microsoft.com/downloads/details.aspx?familyid=C29B6487-78F0-421C-810C-C5E45D6A2352

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms11-017.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms11-017.mspx (Links to External Site)
Cause:   Access control error
Underlying OS:  Windows (2003), Windows (2008), Windows (7), Windows (Vista), Windows (XP)

Message History:   None.


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