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Category:   OS (Microsoft)  >   Windows Kernel Vendors:   Microsoft
Windows Kernel Memory Corruption Error in Win32k.sys Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1025638
SecurityTracker URL:  http://securitytracker.com/id/1025638
CVE Reference:   CVE-2011-1873   (Links to External Site)
Date:  Jun 14 2011
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): XP SP2, 2003 SP2, Vista x64 SP2, 2008 x64 SP2, 2008 Itanium SP2, 7 x64 SP1, 2008 Itanium R2 SP1
Description:   A vulnerability was reported in Windows Win32k.sys. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted OpenType font file on a network share. When the target user visits the network share (or a web site that points to the network share), a memory corruption error in 'Win32k.sys' will occur and arbitrary code will be executed on the target user's system. The code will run with the privileges of the target user.

Koro of www.korosoft.net reported this vulnerability.

Impact:   A remote user can create a file on a network share that, when visited by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued the following fixes:

Windows XP Professional x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=035D5115-54B6-41D3-B9F0-890041EAD178

Windows Server 2003 x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=4AA8C003-0353-4A5B-8AEA-C01A103AF393

Windows Server 2003 with SP2 for Itanium-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=2E07B5FA-C9FA-495B-9352-C07CE46A7E8B

Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=A519A5D7-BFE3-4E53-99E9-D85F7E34237F

Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=CD8F3713-B408-4DB6-AECD-7EED2176A715

Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=5A61F888-C81E-4B8A-8932-2FE67DF4B2AD

Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=E7F52B13-5B3D-438C-AE14-86DA50C8B67A

Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=B77E5BE6-D3EB-4E3A-9BE2-831578F0447C

Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=C00A33BC-C874-4693-B0F7-5034C5DF9424

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms11-041.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms11-041.mspx (Links to External Site)
Cause:   Access control error

Message History:   None.


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