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Apple QuickTime Color Table ID Heap Corruption Vulnerability

03.05.07

BACKGROUND

Quicktime is Apple's media player product used to render video and other media. For more information visit http://www.apple.com/quicktime/

DESCRIPTION

Remote exploitation of a heap corruption vulnerability in Apple Computer Inc.'s QuickTime media player could allow an attacker to execute arbitrary commands in the context of the current user.

The vulnerability specifically exists in QuickTime players handling of Video media atoms. When the 'Color table ID' field in the Video Sample Description is 0, QuickTime expects a color table to be present immediately after the description. A byte swap process is then performed on the memory following the description, regardless if a table is present or not. Heap corruption will occur in the case when the memory following the description is not part of the heap chunk being processed.

ANALYSIS

Exploitation allows an attacker to execute arbitrary code in the context of the current user.

In order to exploit this vulnerability, an attacker must persuade a victim into opening a specially crafted media file. This could be accomplished by either a direct link or referenced from a website under the attacker's control. No further interaction is required in the default configuration.

DETECTION

iDefense Labs confirmed this vulnerability exists in version 7.1.3 of QuickTime on Windows. Previous versions are suspected to be vulnerable.

WORKAROUND

iDefense is currently unaware of any effective workarounds for this vulnerability.

VENDOR RESPONSE

Apple has addressed this vulnerability by releasing version 7.1.5 of Quicktime. More information can be found in Apple Advisory APPLE-SA-2007-03-05 at the following URL.

http://docs.info.apple.com/article.html?artnum=305149

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-0718 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

12/06/2006 Initial vendor notification
12/11/2007 Initial vendor response
02/01/2007 Second vendor notification
03/05/2007 Coordinated public disclosure

CREDIT

This vulnerability was reported to iDefense by Ruben Santamarta of Reversemode Labs (www.reversemode.com).

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LEGAL NOTICES

Copyright © 2007 Verisign, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.