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Category:   Application (Generic)  >   Microsoft Office Vendors:   Microsoft
Microsoft Office Use-After-Free Bug Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1026409
SecurityTracker URL:  http://securitytracker.com/id/1026409
CVE Reference:   CVE-2011-1983   (Links to External Site)
Date:  Dec 13 2011
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2007 SP3, 2010 SP1, 2011 for Mac; and prior service packs
Description:   A vulnerability was reported in Microsoft Office. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted Word file that, when loaded by the target user, will trigger a use-after-free memory error and execute arbitrary code on the target system. The code will run with the privileges of the target user.

Nikita Tarakanov (CISS Research Team) and Alexey Sintsov (Digital Security Research Group) reported this vulnerability via TippingPoint's Zero Day Initiative.

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

Microsoft Office 2007 Service Pack 2 and Microsoft Office 2007 Service Pack 3:

http://www.microsoft.com/downloads/details.aspx?familyid=e924cd85-5764-4056-bd32-b0e57dc25146

Microsoft Office 2010 and Microsoft Office 2010 Service Pack 1 (32-bit editions):

http://www.microsoft.com/downloads/details.aspx?familyid=e47c0694-a9a5-4dd7-bfba-e470d9855c28

Microsoft Office 2010 and Microsoft Office 2010 Service Pack 1 (64-bit editions):

http://www.microsoft.com/downloads/details.aspx?familyid=6c2d5273-eef9-4ff6-be6f-8d86f417f004

Microsoft Office for Mac 2011:

http://www.microsoft.com/downloads/details.aspx?familyid=3c8017d6-232c-42a6-a133-96efe3ad3385

A restart may be required.

The Microsoft advisory is available at:

http://technet.microsoft.com/en-us/security/bulletin/ms11-089

Vendor URL:  technet.microsoft.com/en-us/security/bulletin/ms11-089 (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (macOS/OS X), Windows (Any)

Message History:   None.


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