Home    |    View Topics    |    Search    |    Contact Us    |   



Category:   Application (Generic)  >   Microsoft Virtual PC/Server Vendors:   Microsoft
Microsoft Virtual PC/Server Lets Local Users Gain Elevated Privileges Within a Guest Operating System
SecurityTracker Alert ID:  1022544
SecurityTracker URL:
CVE Reference:   CVE-2009-1542   (Links to External Site)
Updated:  Mar 10 2010
Original Entry Date:  Jul 14 2009
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): PC 2004 SP1, PC 2007 SP1, Server 2005, Server 2005 R2 SP1; and prior service packs
Description:   A vulnerability was reported in Microsoft Virtual PC/Server. A local user can obtain elevated privileges on the target guest operating system.

The software does not properly validate privilege levels when executing specific instructions in the Virtual Machine Monitor. A local user in the guest operating system can execute commands with kernel level privileges (within the guest).

The host operating system is not affected.

Julien Tinnes and Tavis Ormandy of Google Inc. reported this vulnerability.

Impact:   A local user in a guest operating system can obtain elevated privileges within that guest operating system.
Solution:   The vendor has issued the following fixes:

Microsoft Virtual PC 2004 Service Pack 1:

Microsoft Virtual PC 2007:

Microsoft Virtual PC 2007 Service Pack 1:

Microsoft Virtual PC 2007 x64 Edition:

Microsoft Virtual PC 2007 x64 Edition Service Pack 1:

Microsoft Virtual Server 2005:

Microsoft Virtual Server 2005 R2 Service Pack 1:

Microsoft Virtual Server 2005 R2 x64 Edition Service Pack 1:

A restart is required.

On March 9, 2010, Microsoft reissued MS09-033 to indicate that Microsoft Virtual Server 2005 is also affected [as listed above].

The Microsoft advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

Go to the Top of This SecurityTracker Archive Page

Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2021, LLC