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VMware VMnc AVI video codec image height heap overflow

Vulnerability Note VU#444513

Original Release Date: 2009-09-05 | Last Revised: 2012-03-28

Overview

The VMware VMnc video codec fails to properly handle the image height value in AVI files, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

Several VMware products include the ability to create and play movies of running virtual machines. The codec used in these movies is called VMnc, which is based on the VNC RFB protocol. The VMnc decoder is provided by the file vmnc.dll. The VMnc codec fails to properly handle video content with a specified height of less than 8 pixels. This flaw can lead to heap memory corruption. The vulnerable code in vmnc.dll may be reached via Windows applications that supports the DirectShow API.

Impact

By convincing a user to parse a specially crafted VMnc codec AVI file, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. This may occur as the result of several actions, including playing an AVI file with Windows Media Player, viewing a web page that uses the Windows Media Player ActiveX control or plug-in, or even simply by selecting an AVI file in Windows Explorer.

Solution

Apply an update

This issue is addressed in VMware Movie Decoder 6.5.3, Workstation 6.5.3, Player 6.5.3, and ACE 2.5.3. Details for obtaining these versions are available in VMware Security Advisory VMSA-2009-0012.

Remove the VMnc codec

If you are unable to apply an update, this vulnerability can be mitigated by removing the vmnc.dll file. Note that this will prevent a system from being able to play VMnc codec AVI files.

Vendor Information

444513
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VMware

Notified:  June 22, 2009 Updated:  September 05, 2009

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

This issue is addressed in VMWare Movie Decoder 6.5.3, Workstation 6.5.3, Player 6.5.3, and ACE 2.5.3. Details for obtaining these versions are available in VMware Security Advisory VMSA-2009-0012.

Vendor References

http://lists.vmware.com/pipermail/security-announce/2009/000065.html

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base 9.0 AV:N/AC:M/Au:N/C:C/I:C/A:P
Temporal 7.0 E:POC/RL:OF/RC:C
Environmental 7 CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2009-2628
Severity Metric: 4.05
Date Public: 2009-09-04
Date First Published: 2009-09-05
Date Last Updated: 2012-03-28 14:48 UTC
Document Revision: 25

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