July 14, 2009
Microsoft Virtual PC and Virtual Server are prone to a privilege-escalation vulnerability caused by an error in decoding privileged instructions.
Note that this issue affects only systems that do not use hardware-assisted virtualization.
Successful exploits may allow local attackers to elevate privileges within a guest operating system.
- Microsoft Virtual PC 2004
- Microsoft Virtual PC 2004 SP1
- Microsoft Virtual PC 2007
- Microsoft Virtual PC 2007 SP1
- Microsoft Virtual PC 2007 x64 Edition
- Microsoft Virtual PC 2007 x64 Edition SP1
- Microsoft Virtual Server 2005 Enterprise Edition
- Microsoft Virtual Server 2005 Enterprise Edition R2
- Microsoft Virtual Server 2005 R2 SP1
- Microsoft Virtual Server 2005 R2 SP1 x64 Edition
- Microsoft Virtual Server 2005 Standard Edition
- Microsoft Virtual Server 2005 Standard Edition R2
Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Allow only trusted individuals to have local accounts and physical access to vulnerable computers and resources.
The vendor has released an advisory and updates. Please see the references for details.
Julien Tinnes and Tavis Ormandy of Google Inc
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