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CVE-2009-1542

9.0 · HIGH

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 i…

Published Jul 15, 2009microsoftCWE-264EPSS 7.98%

Overview

CVE-2009-1542 is a high-severity vulnerability affecting microsoft virtual_pc. It was published on July 15, 2009 and has a CVSS 2.0 base score of 9.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 9.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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."

Remediation

Check the references section for vendor advisories and patches from microsoft. Update virtual_pc to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/35808Refwww.securitytracker.com/id?1022544Refwww.us-cert.gov/cas/techalerts/TA09-195A.htmlRefwww.vupen.com/english/advisories/2009/1890Refdocs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-033Refoval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6166Refsecunia.com/advisories/35808Refwww.securitytracker.com/id?1022544Refwww.us-cert.gov/cas/techalerts/TA09-195A.htmlRefwww.vupen.com/english/advisories/2009/1890

How CyberStrike helps

Frequently asked questions

What is CVE-2009-1542?

CVE-2009-1542 is a high-severity vulnerability affecting microsoft virtual_pc. It was published on July 15, 2009 and has a CVSS 2.0 base score of 9.0 (HIGH).

How severe is CVE-2009-1542?

This vulnerability has a CVSS 2.0 base score of 9.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2009-1542?

Check the references section for vendor advisories and patches from microsoft. Update virtual_pc to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-1542?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-1542 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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