CVE-2009-1542

Critical

Description

The Virtual Machine Monitor (VMM) in Microsoft Virtual PC 2004 SP1, 2007, and 2007 SP1, and Microsoft Virtual Server 2005 R2 SP1, does not enforce CPU privilege-level requirements for all machine instructions, which allows guest OS users to execute arbitrary kernel-mode code and gain privileges within the guest OS via a crafted application, aka "Virtual PC and Virtual Server Privileged Instruction Decoding Vulnerability."

SeverityCritical

CVSS9.0

Exploit probability—

Product

Microsoft Virtual Pc

PublishedJul 15, 2009

First seenJul 15, 2009

How to fix

Vendor advisories

docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-033

Affected products

Product	Affected versions	Fixed in
microsoft virtual_pc	2004, 2007	—
microsoft virtual_server	2005	—

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