Operating System:

[Win][OSX]

Published:

15 November 2007

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                        ESB-2007.0618 -- [Win][OSX]
        Vulnerability in Virtual PC and Virtual Server Could Allow
                      Elevation of Privilege (937986)
                             15 November 2007

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Microsoft Virtual PC 2004
                      Microsoft Virtual Server 2005 Standard Edition
                      Microsoft Virtual Server 2005 Enterprise Edition
                      Microsoft Virtual Server 2005 R2 Standard Edition
                      Microsoft Virtual Server 2005 R2 Enterprise Edition
                      Microsoft Virtual PC for Mac Version 6.1
                      Microsoft Virtual PC for Mac Version 7
Publisher:            Microsoft
Operating System:     Windows
                      Mac OS X
Impact:               Execute Arbitrary Code/Commands
Access:               Existing Account
CVE Names:            CVE-2007-0948

Original Bulletin:    
    http://www.microsoft.com/technet/security/bulletin/ms07-049.mspx

Revision History:  November 15 2007: Added the Bulletin Re-Release 
                                     information detailing that the 
                                     previous patch may not have installed 
                                     properly and that users should apply 
                                     the update as soon as possible. 
                     August 15 2007: Initial Release

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MS07-049 - Vulnerability in Virtual PC and Virtual Server Could Allow 
Elevation of Privilege (937986)

Bulletin Re-Release 13th November 2007

   The security update for Microsoft Virtual PC 2004, Microsoft Virtual PC
   2004 Service Pack 1, Microsoft Virtual Server 2005 Standard Edition, 
   Microsoft Virtual Server 2005 Enterprise Edition,Microsoft Virtual 
   Server 2005 R2 Standard Edition, and Microsoft Virtual Server 2005 R2 
   Enterprise Edition did not correctly install in certain cases. Microsoft 
   recommends that customers apply the update at the earliest opportunity. 
   No action is required on systems where the security update has been 
   successfully installed. For details please read the "Frequently Asked 
   Questions (FAQ) Related to This Security Update" section.

Affected Software
   Microsoft Virtual PC 2004
   Microsoft Virtual Server 2005 Standard Edition
   Microsoft Virtual Server 2005 Enterprise Edition
   Microsoft Virtual Server 2005 R2 Standard Edition
   Microsoft Virtual Server 2005 R2 Enterprise Edition
   Microsoft Virtual PC for Mac Version 6.1
   Microsoft Virtual PC for Mac Version 7

Non-Affected Software
   Microsoft Virtual PC 2007
   Microsoft Virtual Server 2005 R2 Service Pack 1

Vulnerability Details:

Virtual PC and Virtual Server Heap Overflow Vulnerability - CVE-2007-0948

   An elevation of privilege vulnerability exists in Microsoft Virtual PC
   and Microsoft Virtual Server that could allow a user with
   administrator permissions to the guest operating system to run code on
   the host operating system or other guest operating systems. An
   attacker with administrator permissions to the guest operating system,
   could exploit the vulnerability by running specially crafted code on
   the guest operating system. This could result in a heap overflow on
   the host or other guest operating systems. An attacker who
   successfully exploited this vulnerability could take complete control
   of an affected system.

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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