Secunia

Secunia Research: VMWare VMnc Codec Mismatched Dimensions Buffer Overflow

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                     Secunia Research 07/09/2009

      - VMWare VMnc Codec Mismatched Dimensions Buffer Overflow -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* VMWare Workstation version 6.5.2 build 156735.

NOTE: Other products and versions may also be affected.

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2) Severity 

Rating: Highly critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"VMware Workstation makes it simple to create and run multiple virtual
machines on your desktop or laptop computer. ... You can even use 
Workstation 6.5 to record and play video files ..."

Product Link:
http://www.vmware.com/products/ws/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in various VMWare 
products, which can be exploited by malicious people to compromise a 
user's system.

The vulnerability is caused due to a boundary error in the VMnc codec
(vmnc.dll) and can be exploited to cause a heap-based buffer overflow
via a specially crafted video file with mismatched dimensions.

Successful exploitation may allow execution of arbitrary code.

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5) Solution 

Update to version 6.5.3 build 185404.

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6) Time Table 

30/04/2009 - Vendor notified.
30/04/2009 - Vendor response.
21/08/2009 - Patched VMware Workstation, Player, and ACE released.
04/09/2009 - Patched VMware Workstation Movie Decoder released.
07/09/2009 - Public disclosure.

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7) Credits 

Discovered by Alin Rad Pop, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2009-0199 for the vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-25/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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